diff --git a/app/src/main/java/com/example/login_v3/home/setting/Setting_detail_Screen.kt b/app/src/main/java/com/example/login_v3/home/setting/Setting_detail_Screen.kt
index b893e17..b620f7d 100644
--- a/app/src/main/java/com/example/login_v3/home/setting/Setting_detail_Screen.kt
+++ b/app/src/main/java/com/example/login_v3/home/setting/Setting_detail_Screen.kt
@@ -43,6 +43,8 @@ import com.example.login_v3.home.setting.setting_detail_page.detail_UI.setting_d
 import com.example.login_v3.home.setting.setting_detail_page.detail_UI.setting_subscription_page
 import com.example.login_v3.home.setting.setting_detail_page.detail_UI.setting_theme_page
 import com.example.login_v3.home.setting.setting_detail_page.viewmodel.Theme_ViewModel
+import com.example.login_v3.navigation.AppScreen
+import com.example.login_v3.navigation.AppViewModel
 import com.example.login_v3.navigation.BottomBarViewModel
 
 @Composable
@@ -50,7 +52,8 @@ fun SharedTransitionScope.setting_detail_Screen(
     title: String,
     settingIcon: String,
     animatedVisibilityScope: AnimatedVisibilityScope,
-    bottomBarViewModel: BottomBarViewModel = hiltViewModel()
+    bottomBarViewModel: BottomBarViewModel = hiltViewModel(),
+    appViewModel: AppViewModel = hiltViewModel()
 ){
     //control bottom bar behavior
     DisposableEffect(Unit) {
@@ -123,7 +126,11 @@ fun SharedTransitionScope.setting_detail_Screen(
             startDestination = startRoute
         ) {
 
-            composable("setting_Profile") { Setting_profile_page() }
+            composable("setting_Profile") { Setting_profile_page(
+                onNavigateToAccountSwitch = {
+                    appViewModel.goTo(AppScreen.AccountSwitch)
+                }
+            ) }
             composable("setting_Theme") {
                 val activity = LocalActivity.current as ComponentActivity
                 val vm: Theme_ViewModel = hiltViewModel(viewModelStoreOwner = activity)
diff --git a/app/src/main/java/com/example/login_v3/home/setting/setting_detail_page/detail_UI/setting_Profile_Page.kt b/app/src/main/java/com/example/login_v3/home/setting/setting_detail_page/detail_UI/setting_Profile_Page.kt
index a6ee4de..6e2a4b0 100644
--- a/app/src/main/java/com/example/login_v3/home/setting/setting_detail_page/detail_UI/setting_Profile_Page.kt
+++ b/app/src/main/java/com/example/login_v3/home/setting/setting_detail_page/detail_UI/setting_Profile_Page.kt
@@ -24,8 +24,10 @@ import androidx.compose.foundation.shape.CircleShape
 import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.filled.Edit
+import androidx.compose.material.icons.filled.ManageAccounts
 import androidx.compose.material3.AlertDialog
 import androidx.compose.material3.Button
+import androidx.compose.material3.ButtonDefaults
 import androidx.compose.material3.CircularProgressIndicator
 import androidx.compose.material3.Divider
 import androidx.compose.material3.Icon
@@ -64,7 +66,8 @@ import com.example.login_v3.ui.theme.main_orange
 
 @Composable
 fun Setting_profile_page(
-    viewModel: PersonalProfileViewModel = hiltViewModel()
+    viewModel: PersonalProfileViewModel = hiltViewModel(),
+    onNavigateToAccountSwitch: () -> Unit
 ) {
     val uiState by viewModel.uiState.collectAsState()
     when (val state = uiState) {
@@ -73,7 +76,10 @@ fun Setting_profile_page(
         }
         is ProfileUiState.Success -> {
             // 顯示個人資料
-            Loaded_setting_profile_page(state.profile)
+            Loaded_setting_profile_page(
+                profile = state.profile,
+                onNavigateToAccountSwitch = onNavigateToAccountSwitch // 補上這行
+            )
         }
         is ProfileUiState.Error -> {
             // 顯示錯誤訊息與重試按鈕
@@ -98,7 +104,8 @@ sealed class EditTarget(val title: String) {
 @Composable
 fun Loaded_setting_profile_page(
     profile: UserProfile,
-    viewModel: PersonalProfileViewModel = hiltViewModel()
+    viewModel: PersonalProfileViewModel = hiltViewModel(),
+    onNavigateToAccountSwitch: () -> Unit
 ){
 
     //bia info
@@ -383,5 +390,25 @@ fun Loaded_setting_profile_page(
 
             }
         }
+
+
+        //switch account button
+        Spacer(modifier = Modifier.height(20.dp)) // 將按鈕推到底部
+
+        Button(
+            onClick = onNavigateToAccountSwitch,
+            modifier = Modifier
+                .fillMaxWidth()
+                .padding(10.dp),
+            colors = ButtonDefaults.buttonColors(
+                containerColor = MaterialTheme.colorScheme.secondaryContainer,
+                contentColor = MaterialTheme.colorScheme.onSecondaryContainer
+            ),
+            shape = RoundedCornerShape(12.dp)
+        ) {
+            Icon(Icons.Default.ManageAccounts, contentDescription = null)
+            Spacer(modifier = Modifier.width(8.dp))
+            Text("Manage & Switch Accounts")
+        }
     }
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/example/login_v3/navigation/MainViewModel.kt b/app/src/main/java/com/example/login_v3/navigation/MainViewModel.kt
index 3b4dd6b..f39fb4e 100644
--- a/app/src/main/java/com/example/login_v3/navigation/MainViewModel.kt
+++ b/app/src/main/java/com/example/login_v3/navigation/MainViewModel.kt
@@ -31,7 +31,7 @@ class MainViewModel : ViewModel() {
 
 //init navigation
 enum class AppScreen {
-    PreReg, Login, Register, Home, ScreensTab, Loading
+    PreReg, Login, Register, Home, ScreensTab, Loading, AccountSwitch
 }
 
 @HiltViewModel
diff --git a/app/src/main/java/com/example/login_v3/navigation/nav_controller.kt b/app/src/main/java/com/example/login_v3/navigation/nav_controller.kt
index fbe9537..bc85de8 100644
--- a/app/src/main/java/com/example/login_v3/navigation/nav_controller.kt
+++ b/app/src/main/java/com/example/login_v3/navigation/nav_controller.kt
@@ -14,6 +14,7 @@ import androidx.hilt.navigation.compose.hiltViewModel
 import androidx.lifecycle.viewmodel.compose.viewModel
 import com.example.login_v3.auth.login.LoginScreen
 import com.example.login_v3.auth.Login_or_Reg_page
+import com.example.login_v3.auth.SwitchAccount.AccountSwitchScreen
 import com.example.login_v3.auth.reg.RegisterScreen
 import com.example.login_v3.auth.reg.Register_Screen
 import com.example.login_v3.home.HomeScreen
@@ -64,5 +65,14 @@ fun AppNavGraph(
         )
 
         AppScreen.ScreensTab -> MainScreen_tab()
+
+        AppScreen.AccountSwitch -> {
+            AccountSwitchScreen(
+                // 點擊「登入另一個帳號」就跳轉到 Login 頁面
+                onAddAccountClick = { appViewModel.goTo(AppScreen.Login) },
+                // 點擊返回則回到原本的主分頁 (ScreensTab)
+                onBack = { appViewModel.goTo(AppScreen.ScreensTab) }
+            )
+        }
     }
 }
\ No newline at end of file