diff --git a/debian/changelog b/debian/changelog
index be7474a..c28265f 100755
--- a/debian/changelog
+++ b/debian/changelog
@@ -2,6 +2,7 @@ ukui-menu (3.1.1-ok4~0727) yangtze; urgency=medium
 
   * 增加开始菜单藏文翻译
   * 调整点击应用时窗口隐藏时机
+  * 修改分类下拉选择框宽度
 
  -- lixueman <lixueman@kylinos.cn>  Wed, 27 Jul 2022 20:32:11 +0800
 
diff --git a/src/UserInterface/full_mainwindow.cpp b/src/UserInterface/full_mainwindow.cpp
index 555c6a6..dfd692f 100755
--- a/src/UserInterface/full_mainwindow.cpp
+++ b/src/UserInterface/full_mainwindow.cpp
@@ -177,7 +177,6 @@ void FullMainWindow::initAppListUI()
 void FullMainWindow::initMenu()
 {
     m_dropDownMenu = new MenuBox(this);
-    m_dropDownMenu->setFixedWidth(Style::DropMenuWidth);
     m_allAction = new QAction(m_dropDownMenu);
     m_letterAction = new QAction(m_dropDownMenu);
     m_funcAction = new QAction(m_dropDownMenu);
@@ -381,7 +380,7 @@ void FullMainWindow::iconAnimationFinished()
 {
     m_dropDownMenu->raise();
     m_dropDownMenu->exec(m_fullSelectMenuButton->mapToGlobal(QPoint(m_fullSelectMenuButton->width()
-                                                                -Style::DropMenuWidth, 45)));
+                                                                - m_dropDownMenu->sizeHint().width(), 45)));
 }
 
 void FullMainWindow::keyPressEvent(QKeyEvent *e)
diff --git a/src/UserInterface/mainwindow.cpp b/src/UserInterface/mainwindow.cpp
index 147ddae..8427b34 100755
--- a/src/UserInterface/mainwindow.cpp
+++ b/src/UserInterface/mainwindow.cpp
@@ -560,7 +560,6 @@ void MainWindow::initUi()
     }
 
     m_dropDownMenu = new MenuBox(this);
-    m_dropDownMenu->setFixedWidth(Style::DropMenuWidth);
     m_allAction = new QAction(m_dropDownMenu);
     m_letterAction = new QAction(m_dropDownMenu);
     m_funcAction = new QAction(m_dropDownMenu);
@@ -783,7 +782,7 @@ void MainWindow::iconAnimationFinished()
 {
     m_dropDownMenu->raise();
     m_dropDownMenu->exec(m_selectMenuButton->mapToGlobal(QPoint(m_selectMenuButton->width()
-                                                                -Style::DropMenuWidth + 5, 29)));
+                                                                - m_dropDownMenu->sizeHint().width() + 5, 29)));
 }
 
 void MainWindow::maxAnimationFinished()