diff --git a/services/dialog_ui/enable_notification_dialog/entry/src/main/ets/common/constant.ets b/services/dialog_ui/enable_notification_dialog/entry/src/main/ets/common/constant.ets
index 5bdf485fe31d0377a922534214718052e80acbe3..103426d75e94147967142f5055b019740a2a3c38 100644
--- a/services/dialog_ui/enable_notification_dialog/entry/src/main/ets/common/constant.ets
+++ b/services/dialog_ui/enable_notification_dialog/entry/src/main/ets/common/constant.ets
@@ -147,7 +147,7 @@ export default class Constants {
   public static CROSS_LINE_RESIZE_PARAM = 1.25;
 
   public static FONT_SCALE_DEFAULT = 1;
-  public static FONT_SCALE_MAX = 2;
+  public static FONT_SCALE_MAX = 1.8;
   public static MAX_DIALOG_WIDTH = 400;
 
    //pc
diff --git a/services/dialog_ui/enable_notification_dialog/entry/src/main/ets/pages/notificationDialog.ets b/services/dialog_ui/enable_notification_dialog/entry/src/main/ets/pages/notificationDialog.ets
index fc99751e70a479ae86f53a22f5d5e28ad00ffcc1..bdc6bd9bcf140d8ef329684b68f3c1f2b13ae946 100644
--- a/services/dialog_ui/enable_notification_dialog/entry/src/main/ets/pages/notificationDialog.ets
+++ b/services/dialog_ui/enable_notification_dialog/entry/src/main/ets/pages/notificationDialog.ets
@@ -138,7 +138,8 @@ struct PermissionDialog {
                   let containerWidth = newValue.width as number;
                   let options: MeasureOptions = {
                     textContent: $r('app.string.group_label_notification', this.appName),
-                    fontSize: $r('sys.float.ohos_id_text_size_headline8'),
+                    fontSize: getLimitFontSize(sourceToVp($r('sys.float.ohos_id_text_size_headline8')),
+                      getFontSizeScale(getContext(this) as common.UIAbilityContext, Constants.FONT_SCALE_MAX)),
                     fontWeight: FontWeight.Bold,
                   };
                   this.titleContainerWidth = calContainerWidth(containerWidth, options,
diff --git a/services/dialog_ui/enable_notification_dialog/entry/src/main/ets/pages/pcNotificationDialog.ets b/services/dialog_ui/enable_notification_dialog/entry/src/main/ets/pages/pcNotificationDialog.ets
index 1ae25afddf2b163a92ac94cdea032afd59aef7ea..2e9c3e10347352448a1f50f77fd34bd9504cf798 100644
--- a/services/dialog_ui/enable_notification_dialog/entry/src/main/ets/pages/pcNotificationDialog.ets
+++ b/services/dialog_ui/enable_notification_dialog/entry/src/main/ets/pages/pcNotificationDialog.ets
@@ -150,7 +150,8 @@ struct PermissionDialog {
                     let containerWidth = newValue.width as number;
                     let options: MeasureOptions = {
                       textContent: $r('app.string.group_label_notification', this.appName),
-                      fontSize: $r('sys.float.Title_S'),
+                      fontSize: getLimitFontSize(sourceToVp($r('sys.float.Title_S')),
+                      getFontSizeScale(getContext(this) as common.UIAbilityContext, Constants.FONT_SCALE_MAX)),
                       fontWeight: FontWeight.Bold,
                     };
                     this.titleContainerWidth = calContainerWidth(containerWidth, options,