diff --git a/Bench4Q-Master/src/main/java/org/bench4q/master/domain/factory/PluginEntityFactory.java b/Bench4Q-Master/src/main/java/org/bench4q/master/domain/factory/PluginEntityFactory.java
index 0d0e63a6..48ea666d 100644
--- a/Bench4Q-Master/src/main/java/org/bench4q/master/domain/factory/PluginEntityFactory.java
+++ b/Bench4Q-Master/src/main/java/org/bench4q/master/domain/factory/PluginEntityFactory.java
@@ -22,6 +22,7 @@ import org.bench4q.master.domain.entity.plugin.PluginParamInfo;
 import org.bench4q.master.domain.entity.plugin.PluginUI;
 import org.bench4q.master.domain.entity.plugin.RadioButtonType;
 import org.bench4q.master.domain.entity.plugin.TableType;
+import org.bench4q.master.exception.Bench4QRunTimeException;
 import org.bench4q.master.exception.ExceptionLog;
 import org.dom4j.Attribute;
 import org.dom4j.Document;
@@ -172,8 +173,9 @@ class ParamTypeFactory {
 			return createComboType(element);
 		case "file":
 			return createFileType(element);
+		default:
+			throw new Bench4QRunTimeException("no such type:"+type);
 		}
-		return null;
 
 	}