diff --git a/libsearch/appdata/app-info-table-private.h b/libsearch/appdata/app-info-table-private.h
index b62ae45..b842718 100644
--- a/libsearch/appdata/app-info-table-private.h
+++ b/libsearch/appdata/app-info-table-private.h
@@ -67,7 +67,7 @@ private:
     QDBusInterface *m_appDBInterface = nullptr;
 
     AppInfoTable *q = nullptr;
-    QSqlDatabase m_database;
+    QSqlDatabase *m_database = nullptr;
     QString m_ConnectionName;
 
 public Q_SLOTS:
diff --git a/libsearch/appdata/app-info-table.cpp b/libsearch/appdata/app-info-table.cpp
index debe2e8..634f438 100644
--- a/libsearch/appdata/app-info-table.cpp
+++ b/libsearch/appdata/app-info-table.cpp
@@ -19,7 +19,7 @@
 
 using namespace UkuiSearch;
 
-AppInfoTablePrivate::AppInfoTablePrivate(AppInfoTable *parent) : QObject(parent), q(parent), m_database(QSqlDatabase())
+AppInfoTablePrivate::AppInfoTablePrivate(AppInfoTable *parent) : QObject(parent), q(parent), m_database(new QSqlDatabase())
 {
     //dbus接收数据库信号
 
@@ -55,7 +55,7 @@ AppInfoTablePrivate::AppInfoTablePrivate(AppInfoTable *parent) : QObject(parent)
     qDebug() << "App info database currunt connection name:" << m_ConnectionName;
     if (!this->openDataBase()) {
         Q_EMIT q->DBOpenFailed();
-        qWarning() << "Fail to open App DataBase, because:" << m_database.lastError();
+        qWarning() << "Fail to open App DataBase, because:" << m_database->lastError();
     }
 }
 
@@ -224,8 +224,8 @@ bool AppInfoTablePrivate::addAppShortcut2Panel(QString &desktopfp)
 bool AppInfoTablePrivate::searchInstallApp(QString &keyWord, QStringList &installAppInfoRes)
 {
     bool res(true);
-    if (m_database.transaction()) {
-        QSqlQuery sql(m_database);
+    if (m_database->transaction()) {
+        QSqlQuery sql(*m_database);
         QString cmd;
         if (keyWord.size() < 2) {
             cmd = QString("SELECT DESKTOP_FILE_PATH,LOCAL_NAME,ICON FROM APPINFO WHERE LOCAL_NAME OR NAME_EN OR NAME_ZH OR FIRST_LETTER_OF_PINYIN LIKE '%%0%' ORDER BY FAVORITES DESC")
@@ -240,12 +240,12 @@ bool AppInfoTablePrivate::searchInstallApp(QString &keyWord, QStringList &instal
                 installAppInfoRes << sql.value(0).toString() << sql.value(1).toString() << sql.value(2).toString();
             }
         } else {
-            qWarning() << QString("cmd %0 failed!").arg(cmd) << m_database.lastError();
+            qWarning() << QString("cmd %0 failed!").arg(cmd) << m_database->lastError();
             res = false;
         }
-        if (!m_database.commit()) {
+        if (!m_database->commit()) {
             qWarning() << "Failed to commit !" << cmd;
-            m_database.rollback();
+            m_database->rollback();
             res = false;
         }
     } else {
@@ -258,8 +258,8 @@ bool AppInfoTablePrivate::searchInstallApp(QString &keyWord, QStringList &instal
 bool AppInfoTablePrivate::searchInstallApp(QStringList &keyWord, QStringList &installAppInfoRes)
 {
     bool res(true);
-    if (m_database.transaction() or keyWord.size() != 0) {
-        QSqlQuery sql(m_database);
+    if (m_database->transaction() or keyWord.size() != 0) {
+        QSqlQuery sql(*m_database);
         QString cmd;
         if (keyWord.at(0).size() < 2) {
             cmd = QString("SELECT DESKTOP_FILE_PATH,LOCAL_NAME,ICON,NAME_EN,NAME_ZH,FIRST_LETTER_OF_PINYIN FROM APPINFO"
@@ -285,12 +285,12 @@ bool AppInfoTablePrivate::searchInstallApp(QStringList &keyWord, QStringList &in
                 installAppInfoRes << sql.value(0).toString() << sql.value(1).toString() << sql.value(2).toString();
             }
         } else {
-            qWarning() << QString("cmd %0 failed!").arg(cmd) << m_database.lastError();
+            qWarning() << QString("cmd %0 failed!").arg(cmd) << m_database->lastError();
             res = false;
         }
-        if (!m_database.commit()) {
+        if (!m_database->commit()) {
             qWarning() << "Failed to commit !" << cmd;
-            m_database.rollback();
+            m_database->rollback();
             res = false;
         }
     } else {
@@ -344,26 +344,26 @@ bool AppInfoTablePrivate::uninstallApp(QString &desktopfp)
 
 QString AppInfoTablePrivate::lastError() const
 {
-    return m_database.lastError().text();
+    return m_database->lastError().text();
 }
 
 bool AppInfoTablePrivate::setAppLaunchTimes(QString &desktopfp, size_t num)
 {
     bool res(true);
-    if (m_database.transaction()) {
-        QSqlQuery sql(m_database);
+    if (m_database->transaction()) {
+        QSqlQuery sql(*m_database);
         QString cmd = QString("UPDATE appInfo SET MODIFYED_TIME='%0', LAUNCH_TIMES=%1, LAUNCHED=%2 WHERE DESKTOP_FILE_PATH='%3'")
                 .arg(QDateTime::currentDateTime().toString("yyyy-MM-dd hh:mm:ss"))
                 .arg(num)
                 .arg(1)
                 .arg(desktopfp);
         if (!sql.exec(cmd)) {
-            qWarning() << "Set app favorites state failed!" << m_database.lastError();
+            qWarning() << "Set app favorites state failed!" << m_database->lastError();
             res = false;
         }
-        if (!m_database.commit()) {
+        if (!m_database->commit()) {
             qWarning() << "Failed to commit !" << cmd;
-            m_database.rollback();
+            m_database->rollback();
             res = false;
         }
     } else {
@@ -376,8 +376,8 @@ bool AppInfoTablePrivate::setAppLaunchTimes(QString &desktopfp, size_t num)
 bool AppInfoTablePrivate::updateAppLaunchTimes(QString &desktopfp)
 {
     bool res(true);
-    if (m_database.transaction()) {
-        QSqlQuery sql(m_database);
+    if (m_database->transaction()) {
+        QSqlQuery sql(*m_database);
         QString cmd = QString("SELECT LAUNCH_TIMES FROM APPINFO WHERE DESKTOP_FILE_PATH='%1'").arg(desktopfp);
         if (sql.exec(cmd)) {
             if (sql.next()) {
@@ -387,7 +387,7 @@ bool AppInfoTablePrivate::updateAppLaunchTimes(QString &desktopfp)
                         .arg(1)
                         .arg(desktopfp);
                 if (!sql.exec(cmd)) {
-                    qWarning() << "Set app favorites state failed!" << m_database.lastError();
+                    qWarning() << "Set app favorites state failed!" << m_database->lastError();
                     res = false;
                 }
             } else {
@@ -398,9 +398,9 @@ bool AppInfoTablePrivate::updateAppLaunchTimes(QString &desktopfp)
             qWarning() << "Failed to exec:" << cmd;
             res = false;
         }
-        if (!m_database.commit()) {
+        if (!m_database->commit()) {
             qWarning() << "Failed to commit !" << cmd;
-            m_database.rollback();
+            m_database->rollback();
             res = false;
         }
     } else {
@@ -413,19 +413,19 @@ bool AppInfoTablePrivate::updateAppLaunchTimes(QString &desktopfp)
 bool AppInfoTablePrivate::setAppLockState(QString &desktopfp, size_t num)
 {
     bool res(true);
-    if (m_database.transaction()) {
-        QSqlQuery sql(m_database);
+    if (m_database->transaction()) {
+        QSqlQuery sql(*m_database);
         QString cmd = QString("UPDATE appInfo SET MODIFYED_TIME='%0', LOCK=%1 WHERE DESKTOP_FILE_PATH='%2'")
                 .arg(QDateTime::currentDateTime().toString("yyyy-MM-dd hh:mm:ss"))
                 .arg(num)
                 .arg(desktopfp);
         if (!sql.exec(cmd)) {
-            qWarning() << "Set app favorites state failed!" << m_database.lastError();
+            qWarning() << "Set app favorites state failed!" << m_database->lastError();
             res = false;
         }
-        if (!m_database.commit()) {
+        if (!m_database->commit()) {
             qWarning() << "Failed to commit !" << cmd;
-            m_database.rollback();
+            m_database->rollback();
             res = false;
         }
     } else {
@@ -438,7 +438,7 @@ bool AppInfoTablePrivate::setAppLockState(QString &desktopfp, size_t num)
 bool AppInfoTablePrivate::getAllAppDesktopList(QStringList &list)
 {
     bool res(true);
-    QSqlQuery sql(m_database);
+    QSqlQuery sql(*m_database);
     QString cmd = QString("SELECT DESKTOP_FILE_PATH FROM APPINFO");
 
     if (sql.exec(cmd)) {
@@ -446,7 +446,7 @@ bool AppInfoTablePrivate::getAllAppDesktopList(QStringList &list)
             list.append(sql.value(0).toString());
         }
     } else {
-        qWarning() << QString("cmd %0 failed!").arg(cmd) << m_database.lastError();
+        qWarning() << QString("cmd %0 failed!").arg(cmd) << m_database->lastError();
         res = false;
     }
 
@@ -456,14 +456,14 @@ bool AppInfoTablePrivate::getAllAppDesktopList(QStringList &list)
 bool AppInfoTablePrivate::getFavoritesAppList(QStringList &list)
 {
     bool res(true);
-    QSqlQuery sql(m_database);
+    QSqlQuery sql(*m_database);
     QString cmd = QString("SELECT DESKTOP_FILE_PATH FROM APPINFO WHERE FAVORITES!=0 ORDER BY FAVORITES");
     if (sql.exec(cmd)) {
         while (sql.next()) {
             list.append(sql.value(0).toString());
         }
     } else {
-        qWarning() << QString("cmd %0 failed!").arg(cmd) << m_database.lastError();
+        qWarning() << QString("cmd %0 failed!").arg(cmd) << m_database->lastError();
         res = false;
     }
     return res;
@@ -472,7 +472,7 @@ bool AppInfoTablePrivate::getFavoritesAppList(QStringList &list)
 bool AppInfoTablePrivate::getTopAppList(QStringList &list)
 {
     bool res(true);
-    QSqlQuery sql(m_database);
+    QSqlQuery sql(*m_database);
     QString cmd = QString("SELECT DESKTOP_FILE_PATH FROM APPINFO WHERE TOP!=0 ORDER BY TOP");
 
     if (sql.exec(cmd)) {
@@ -480,7 +480,7 @@ bool AppInfoTablePrivate::getTopAppList(QStringList &list)
             list.append(sql.value(0).toString());
         }
     } else {
-        qWarning() << QString("cmd %0 failed!").arg(cmd) << m_database.lastError();
+        qWarning() << QString("cmd %0 failed!").arg(cmd) << m_database->lastError();
         res = false;
     }
 
@@ -490,9 +490,9 @@ bool AppInfoTablePrivate::getTopAppList(QStringList &list)
 bool AppInfoTablePrivate::getLaunchTimesAppList(QStringList &list)
 {
     bool res(true);
-    if (m_database.transaction()) {
-        QSqlQuery sql(m_database);
-        QSqlQuery sqlque(m_database);
+    if (m_database->transaction()) {
+        QSqlQuery sql(*m_database);
+        QSqlQuery sqlque(*m_database);
         QString cmd = QString("SELECT DESKTOP_FILE_PATH FROM APPINFO ORDER BY LAUNCH_TIMES");
         int count = 0;
         if (sql.exec(cmd)) {
@@ -502,18 +502,18 @@ bool AppInfoTablePrivate::getLaunchTimesAppList(QStringList &list)
                         .arg(++count)
                         .arg(sql.value(0).toString());
                 if (!sqlque.exec(cmd)) {
-                    qWarning() << QString("cmd %0 failed!").arg(cmd) << m_database.lastError();
+                    qWarning() << QString("cmd %0 failed!").arg(cmd) << m_database->lastError();
                     res = false;
                     break;
                 }
             }
         } else {
-            qWarning() << QString("cmd %0 failed!").arg(cmd) << m_database.lastError();
+            qWarning() << QString("cmd %0 failed!").arg(cmd) << m_database->lastError();
             res = false;
         }
-        if (!m_database.commit()) {
+        if (!m_database->commit()) {
             qWarning() << "Failed to commit !" << cmd;
-            m_database.rollback();
+            m_database->rollback();
             res = false;
         }
     } else {
@@ -526,13 +526,19 @@ bool AppInfoTablePrivate::getLaunchTimesAppList(QStringList &list)
 AppInfoTablePrivate::~AppInfoTablePrivate()
 {
     this->closeDataBase();
+    if (m_signalTransInterface)
+        delete m_signalTransInterface;
+    m_signalTransInterface = nullptr;
+    if (m_appDBInterface)
+        delete m_appDBInterface;
+    m_appDBInterface = nullptr;
 }
 
 bool AppInfoTablePrivate::initDateBaseConnection()
 {
-    m_database.setDatabaseName(APP_DATABASE_PATH + APP_DATABASE_NAME);
-    if(!m_database.open()) {
-        qWarning() << m_database.lastError();
+    m_database->setDatabaseName(APP_DATABASE_PATH + APP_DATABASE_NAME);
+    if(!m_database->open()) {
+        qWarning() << m_database->lastError();
         return false;
 //        QApplication::quit();
     }
@@ -541,10 +547,10 @@ bool AppInfoTablePrivate::initDateBaseConnection()
 
 bool AppInfoTablePrivate::openDataBase()
 {
-    m_database = QSqlDatabase::addDatabase("QSQLITE", m_ConnectionName);
-    m_database.setDatabaseName(APP_DATABASE_PATH + APP_DATABASE_NAME);
+    *m_database = QSqlDatabase::addDatabase("QSQLITE", m_ConnectionName);
+    m_database->setDatabaseName(APP_DATABASE_PATH + APP_DATABASE_NAME);
 
-    if(!m_database.open()) {
+    if(!m_database->open()) {
         return false;
     }
     return true;
@@ -552,8 +558,9 @@ bool AppInfoTablePrivate::openDataBase()
 
 void AppInfoTablePrivate::closeDataBase()
 {
-    m_database.close();
-//    delete m_database;
+    m_database->close();
+    delete m_database;
+    m_database = nullptr;
     QSqlDatabase::removeDatabase(m_ConnectionName);
 }
 
diff --git a/libsearch/appsearch/app-search-plugin.cpp b/libsearch/appsearch/app-search-plugin.cpp
index bb8e66b..dc3bfc4 100644
--- a/libsearch/appsearch/app-search-plugin.cpp
+++ b/libsearch/appsearch/app-search-plugin.cpp
@@ -333,16 +333,14 @@ bool AppSearchPlugin::installAppAction(const QString & name) {
                 "/com/kylin/softwarecenter",
                 "com.kylin.utiliface",
                 QDBusConnection::sessionBus());
-
+    bool res(false);
     if(interface->isValid()) {
         //软件商店已打开，直接跳转
         interface->call("show_search_result", name);
-        bool reply = QDBusReply<bool>(interface->call(QString("show_search_result"), name));
-        return reply;
+        res = QDBusReply<bool>(interface->call(QString("show_search_result"), name));
     } else {
         //软件商店未打开，打开软件商店下载此软件
         qDebug() << "Softwarecenter has not been launched, now launch it." << name;
-        bool res(false);
         QDBusInterface * appLaunchInterface = new QDBusInterface("com.kylin.AppManager",
                                                                  "/com/kylin/AppManager",
                                                                  "com.kylin.AppManager",
@@ -363,12 +361,17 @@ bool AppSearchPlugin::installAppAction(const QString & name) {
         if(appLaunchInterface) {
             delete appLaunchInterface;
         }
-        appLaunchInterface = NULL;
-        if (res)
-            return true;
-        QProcess process;
-        return process.startDetached(QString("kylin-software-center -find %1").arg(name));
+        appLaunchInterface = nullptr;
+        if (!res) {
+            QProcess process;
+            res = process.startDetached(QString("kylin-software-center -find %1").arg(name));
+        }
     }
+    if(interface) {
+        delete interface;
+    }
+    interface = nullptr;
+    return res;
 }
 
 //AppSearch::AppSearch(DataQueue<SearchPluginIface::ResultInfo> *searchResult, DataQueue<ResultItem>* appSearchResults, UkuiSearchTask *appSearchTask, QString keyword, size_t uniqueSymbol)
diff --git a/libsearch/dirwatcher/dir-watcher.cpp b/libsearch/dirwatcher/dir-watcher.cpp
index 54c8d86..55bcb87 100644
--- a/libsearch/dirwatcher/dir-watcher.cpp
+++ b/libsearch/dirwatcher/dir-watcher.cpp
@@ -25,6 +25,13 @@ DirWatcher::DirWatcher(QObject *parent)
     }
 }
 
+DirWatcher::~DirWatcher()
+{
+    if (m_dbusInterface)
+        delete m_dbusInterface;
+    m_dbusInterface = nullptr;
+}
+
 DirWatcher *DirWatcher::getDirWatcher()
 {
     std::call_once(flag, [ & ] {
diff --git a/libsearch/dirwatcher/dir-watcher.h b/libsearch/dirwatcher/dir-watcher.h
index 56ea7e5..041acb3 100644
--- a/libsearch/dirwatcher/dir-watcher.h
+++ b/libsearch/dirwatcher/dir-watcher.h
@@ -31,7 +31,7 @@ Q_SIGNALS:
     void removeIndexItem(const QString&);
 private:
     DirWatcher(QObject *parent = nullptr);
-    ~DirWatcher() = default;
+    ~DirWatcher();
 
     QDBusInterface *m_dbusInterface = nullptr;
 
diff --git a/libsearch/index/ukui-search-qdbus.cpp b/libsearch/index/ukui-search-qdbus.cpp
index 54070b3..5c6159e 100644
--- a/libsearch/index/ukui-search-qdbus.cpp
+++ b/libsearch/index/ukui-search-qdbus.cpp
@@ -31,7 +31,8 @@ UkuiSearchQDBus::UkuiSearchQDBus() {
     }
 }
 UkuiSearchQDBus::~UkuiSearchQDBus() {
-    delete this->tmpSystemQDBusInterface;
+    if (this->tmpSystemQDBusInterface)
+        delete this->tmpSystemQDBusInterface;
     this->tmpSystemQDBusInterface = nullptr;
 }
 
diff --git a/libsearch/searchinterface/searchtasks/app-search-task.cpp b/libsearch/searchinterface/searchtasks/app-search-task.cpp
index 13e6dd0..94e749f 100644
--- a/libsearch/searchinterface/searchtasks/app-search-task.cpp
+++ b/libsearch/searchinterface/searchtasks/app-search-task.cpp
@@ -143,7 +143,9 @@ void AppSearchWorker::run()
 
 AppSearchWorker::~AppSearchWorker()
 {
-
+    if (m_interFace)
+        delete m_interFace;
+    m_interFace = nullptr;
 }
 
 void AppSearchWorker::sendErrorMsg(const QString &msg)
diff --git a/libsearch/searchinterface/searchtasks/file-search-task.cpp b/libsearch/searchinterface/searchtasks/file-search-task.cpp
index c5a0024..9b6f73b 100644
--- a/libsearch/searchinterface/searchtasks/file-search-task.cpp
+++ b/libsearch/searchinterface/searchtasks/file-search-task.cpp
@@ -197,6 +197,8 @@ bool FileSearchWorker::directSearch()
 
     while (!searchPathQueue.empty()) {
         dir.setPath(searchPathQueue.dequeue());
+        if (!dir.exists())
+            continue;
         infoList = dir.entryInfoList();
 
         for (const auto &fileInfo : infoList) {
diff --git a/ukui-search-service-dir-manager/dirwatcher/dir-watcher.cpp b/ukui-search-service-dir-manager/dirwatcher/dir-watcher.cpp
index 5bc1007..34b0883 100644
--- a/ukui-search-service-dir-manager/dirwatcher/dir-watcher.cpp
+++ b/ukui-search-service-dir-manager/dirwatcher/dir-watcher.cpp
@@ -42,6 +42,7 @@ DirWatcher::~DirWatcher()
     if(m_qSettings){
         delete m_qSettings;
     }
+    m_qSettings = nullptr;
 }
 
 DirWatcher *DirWatcher::getDirWatcher()