diff --git a/shell/platform/ohos/flutter_embedding/flutter/src/main/ets/plugin/editing/TextInputPlugin.ets b/shell/platform/ohos/flutter_embedding/flutter/src/main/ets/plugin/editing/TextInputPlugin.ets
index 8bf6fcbbbfa2df00f8ef67780d370682cb69f1a3..7beecd22320be597df272335cb030c5503537b70 100644
--- a/shell/platform/ohos/flutter_embedding/flutter/src/main/ets/plugin/editing/TextInputPlugin.ets
+++ b/shell/platform/ohos/flutter_embedding/flutter/src/main/ets/plugin/editing/TextInputPlugin.ets
@@ -100,6 +100,59 @@ class TextInputMethodHandlerImpl implements TextInputMethodHandler {
     this.listenShowKeyboardHeight();
   }
 
+  private keyboardHeightChangeCallback = (data: number) => {
+    console.info('Succeeded in enabling the listener for keyboard height changes. Data: ' + JSON.stringify(data));
+    if (data == 0) {
+      this.showType = keyboardType.ENTRY
+    } else {
+      this.showType = keyboardType.NONE
+    }
+  }
+
+  private insertTextCallback = (text: string) => {
+    Log.d(TextInputMethodHandlerImpl.TAG, "insertText: " + text);
+    this.mEditable.handleInsertTextEvent(text);
+  }
+
+  private deleteLeftCallback = (length: number) => {
+    /// 暂时规避方案
+    /// OS机制与Android不一致，需要去监听软键盘事件才能发送KeyEvent事件
+    if (this.mEditable.getStringCache() == "") {
+      this.sendKeyboardEvent(KeyType.Down, KeyCode.KEYCODE_DEL)
+      this.sendKeyboardEvent(KeyType.Up, KeyCode.KEYCODE_DEL)
+    }
+    this.mEditable.handleDeleteEvent(false, length);
+  }
+
+  private deleteRightCallback = (length: number) => {
+    this.mEditable.handleDeleteEvent(true, length);
+  }
+
+  private sendFunctionKeyCallback = (functionKey: inputMethod.FunctionKey) => {
+    /// 临时规避缺少newline对应枚举类型问题
+    if (functionKey.enterKeyType == NEWLINE_KEY_TYPE) {
+      this.mEditable.handleNewlineEvent();
+    } else {
+      this.showType = keyboardType.DONE
+    }
+    this.mEditable.handleFunctionKey(functionKey);
+  }
+
+  private sendKeyboardStatusCallback = (state: inputMethod.KeyboardStatus) => {
+    if (state == inputMethod.KeyboardStatus.HIDE) {
+      this.plugin.textInputChannel.onConnectionClosed(this.inputTarget.id);
+      if (this.showType != keyboardType.DONE) {
+        this.showType = keyboardType.TRANSFER
+      }
+      this.hideTextInput()
+      this.cancelListenKeyBoardEvent()
+    }
+  }
+
+  private selectByRangeCallback = (range: inputMethod.Range) => {
+    this.mEditable.handleSelectByRange(range);
+  }
+
   show(): void {
     this.showTextInput();
   }
@@ -182,14 +235,7 @@ class TextInputMethodHandlerImpl implements TextInputMethodHandler {
   listenShowKeyboardHeight() {
     window.getLastWindow(getContext(this)).then(currentWindow => {
       try {
-        currentWindow.on('keyboardHeightChange', (data) => {
-          console.info('Succeeded in enabling the listener for keyboard height changes. Data: ' + JSON.stringify(data));
-          if (data == 0) {
-            this.showType = keyboardType.ENTRY
-          } else {
-            this.showType = keyboardType.NONE
-          }
-        });
+        currentWindow.on('keyboardHeightChange', this.keyboardHeightChangeCallback);
       } catch (exception) {
         console.error(`Failed to enable the listener for keyboard height changes. Cause code: ${exception.code}, message: ${exception.message}`);
       }
@@ -200,7 +246,7 @@ class TextInputMethodHandlerImpl implements TextInputMethodHandler {
   listenHideKeyboardHeight() {
     window.getLastWindow(getContext(this)).then(currentWindow => {
       try {
-        currentWindow.off('keyboardHeightChange');
+        currentWindow.off('keyboardHeightChange', this.keyboardHeightChangeCallback);
       } catch (exception) {
         console.error(`Failed to enable the listener for keyboard height changes. Cause code: ${exception.code}, message: ${exception.message}`);
       }
@@ -271,10 +317,7 @@ class TextInputMethodHandlerImpl implements TextInputMethodHandler {
 
   listenKeyBoardEvent(): void {
     try {
-      this.inputMethodController.on('insertText', (text) => {
-        Log.d(TextInputMethodHandlerImpl.TAG, "insertText: " + text);
-        this.mEditable.handleInsertTextEvent(text);
-      });
+      this.inputMethodController.on('insertText', this.insertTextCallback);
     } catch (err) {
       Log.e(TextInputMethodHandlerImpl.TAG, "Failed to subscribe insertText:" + JSON.stringify(err));
       this.cancelListenKeyBoardEvent();
@@ -282,15 +325,7 @@ class TextInputMethodHandlerImpl implements TextInputMethodHandler {
     }
 
     try {
-      this.inputMethodController.on('deleteLeft', (length) => {
-        /// 暂时规避方案
-        /// OS机制与Android不一致，需要去监听软键盘事件才能发送KeyEvent事件
-        if (this.mEditable.getStringCache() == "") {
-          this.sendKeyboardEvent(KeyType.Down, KeyCode.KEYCODE_DEL)
-          this.sendKeyboardEvent(KeyType.Up, KeyCode.KEYCODE_DEL)
-        }
-        this.mEditable.handleDeleteEvent(false, length);
-      })
+      this.inputMethodController.on('deleteLeft', this.deleteLeftCallback)
     } catch (err) {
       Log.e(TextInputMethodHandlerImpl.TAG, "Failed to subscribe deleteLeft:" + JSON.stringify(err));
       this.cancelListenKeyBoardEvent();
@@ -298,9 +333,7 @@ class TextInputMethodHandlerImpl implements TextInputMethodHandler {
     }
 
     try {
-      this.inputMethodController.on('deleteRight', (length) => {
-        this.mEditable.handleDeleteEvent(true, length);
-      })
+      this.inputMethodController.on('deleteRight', this.deleteRightCallback)
     } catch (err) {
       Log.e(TextInputMethodHandlerImpl.TAG, "Failed to subscribe deleteRight:" + JSON.stringify(err));
       this.cancelListenKeyBoardEvent();
@@ -308,15 +341,7 @@ class TextInputMethodHandlerImpl implements TextInputMethodHandler {
     }
 
     try {
-      this.inputMethodController.on('sendFunctionKey', (functionKey) => {
-        /// 临时规避缺少newline对应枚举类型问题
-        if (functionKey.enterKeyType == NEWLINE_KEY_TYPE) {
-          this.mEditable.handleNewlineEvent();
-        } else {
-          this.showType = keyboardType.DONE
-        }
-        this.mEditable.handleFunctionKey(functionKey);
-      })
+      this.inputMethodController.on('sendFunctionKey', this.sendFunctionKeyCallback)
     } catch (err) {
       Log.e(TextInputMethodHandlerImpl.TAG, "Failed to subscribe sendFunctionKey:" + JSON.stringify(err));
       this.cancelListenKeyBoardEvent();
@@ -324,16 +349,7 @@ class TextInputMethodHandlerImpl implements TextInputMethodHandler {
     }
 
     try {
-      this.inputMethodController.on('sendKeyboardStatus', (state) => {
-        if (state == inputMethod.KeyboardStatus.HIDE) {
-          this.plugin.textInputChannel.onConnectionClosed(this.inputTarget.id);
-          if (this.showType != keyboardType.DONE) {
-            this.showType = keyboardType.TRANSFER
-          }
-          this.hideTextInput()
-          this.cancelListenKeyBoardEvent()
-        }
-      })
+      this.inputMethodController.on('sendKeyboardStatus', this.sendKeyboardStatusCallback)
     } catch (err) {
       Log.e(TextInputMethodHandlerImpl.TAG, "Failed to subscribe sendKeyboardStatus:" + JSON.stringify(err));
       this.cancelListenKeyBoardEvent();
@@ -341,9 +357,7 @@ class TextInputMethodHandlerImpl implements TextInputMethodHandler {
     }
 
     try {
-      this.inputMethodController.on('selectByRange', (range: inputMethod.Range) => {
-        this.mEditable.handleSelectByRange(range);
-      })
+      this.inputMethodController.on('selectByRange', this.selectByRangeCallback)
     } catch (err) {
       Log.e(TextInputMethodHandlerImpl.TAG, "Failed to subscribe selectByRange:" + JSON.stringify(err));
       this.cancelListenKeyBoardEvent();
@@ -373,12 +387,12 @@ class TextInputMethodHandlerImpl implements TextInputMethodHandler {
   }
 
   cancelListenKeyBoardEvent(): void {
-    this.inputMethodController.off('insertText');
-    this.inputMethodController.off('deleteLeft');
-    this.inputMethodController.off('deleteRight');
-    this.inputMethodController.off('sendFunctionKey');
-    this.inputMethodController.off('sendKeyboardStatus');
-    this.inputMethodController.off('selectByRange');
+    this.inputMethodController.off('insertText', this.insertTextCallback);
+    this.inputMethodController.off('deleteLeft', this.deleteLeftCallback);
+    this.inputMethodController.off('deleteRight', this.deleteRightCallback);
+    this.inputMethodController.off('sendFunctionKey', this.sendFunctionKeyCallback);
+    this.inputMethodController.off('sendKeyboardStatus', this.sendKeyboardStatusCallback);
+    this.inputMethodController.off('selectByRange', this.selectByRangeCallback);
     this.imcFlag = false;
   }