diff --git a/ipcTypes.js b/ipcTypes.js
index 61bacc7..e8ae6a9 100644
--- a/ipcTypes.js
+++ b/ipcTypes.js
@@ -23,3 +23,6 @@ exports.OPEN_FILE = "open-file";
 exports.OPEN_SETTING_WINDOW = "open-setting-window";
 exports.OPEN_LOCATION_DIALOG = "open-location-dialog";
 exports.SAVE_LOCATION_PATH = "save-location-path";
+
+// more details
+exports.SAVE_EDIT_FILE = "save-edit-file";
\ No newline at end of file
diff --git a/main.js b/main.js
index f4d5221..1b11777 100644
--- a/main.js
+++ b/main.js
@@ -150,6 +150,15 @@ app.whenReady().then(() => {
 
     ipcMain.handle(ipcTypes.OPEN_CONTEXT_MENU, (_e) => { return showContextMenu(_e) })
 
+    ipcMain.handle(ipcTypes.SAVE_EDIT_FILE, (_e) => {
+        return dialog.showMessageBox({
+            type: "question",
+            buttons: ["取消", "确定"],
+            title: "文件修改未保存",
+            message: "是否要保存正在关闭文件的修改"
+        })
+    })
+
 })
 app.on('window-all-closed', () => {
     if (process.platform !== 'darwin') app.quit()
diff --git a/preload.js b/preload.js
index 7662f49..8577b00 100644
--- a/preload.js
+++ b/preload.js
@@ -73,4 +73,7 @@ contextBridge.exposeInMainWorld("myApp", {
     // setting window
     openSettingDialog: () => ipcRenderer.invoke(ipcTypes.OPEN_LOCATION_DIALOG),
     saveSettingPath: (path) => settingStore.set("savedLocation", path),
+
+    // more details
+    showSaveBox: () => ipcRenderer.invoke(ipcTypes.SAVE_EDIT_FILE),
 })
diff --git a/src/App.jsx b/src/App.jsx
index 70ad7b9..9dd142a 100644
--- a/src/App.jsx
+++ b/src/App.jsx
@@ -145,11 +145,13 @@ function App() {
 
   const saveContent = () => {
     if (activeFile.current) {
-      const { path, body } = activeFile.current;
+      const { id, path, body } = activeFile.current;
       fileDealer.writeFile(path, body).then(() => {
-        setUnSavedFiles(
-          unSavedFiles.filter((id) => id !== activeFile.current.id)
-        );
+        if (!unSavedFiles.filter((fileID) => fileID !== id)) {
+          setUnSavedFiles(unSavedFiles.filter((fileID) => fileID !== id));
+        } else {
+          setUnSavedFiles([]);
+        }
       });
     }
   };
@@ -158,11 +160,38 @@ function App() {
   const closeFile = (fileID) => {
     const afterCloseIDs = openedFilesID.filter((itemID) => itemID !== fileID);
     setOpenedFilesID(afterCloseIDs);
-    if (fileID === activeFileID) {
-      if (afterCloseIDs.length > 0) {
-        setActiveFileID(afterCloseIDs[0]);
-      } else {
-        setActiveFileID("");
+
+    if (unSavedFiles.includes(fileID)) {
+      window.myApp.showSaveBox().then((res) => {
+        if (res.response === 1) {
+          saveContent();
+          if (fileID === activeFileID) {
+            if (afterCloseIDs.length > 0) {
+              setActiveFileID(afterCloseIDs[0]);
+            } else {
+              setActiveFileID("");
+            }
+          }
+        } else if (res.response === 0) {
+          setUnSavedFiles(
+            unSavedFiles.filter((id) => id !== activeFile.current.id)
+          );
+          if (fileID === activeFileID) {
+            if (afterCloseIDs.length > 0) {
+              setActiveFileID(afterCloseIDs[0]);
+            } else {
+              setActiveFileID("");
+            }
+          }
+        }
+      });
+    } else {
+      if (fileID === activeFileID) {
+        if (afterCloseIDs.length > 0) {
+          setActiveFileID(afterCloseIDs[0]);
+        } else {
+          setActiveFileID("");
+        }
       }
     }
   };