diff --git a/app/src/assets/scss/_wysiwyg.scss b/app/src/assets/scss/_wysiwyg.scss
index 4930fc43f..69e0cc3f3 100644
--- a/app/src/assets/scss/_wysiwyg.scss
+++ b/app/src/assets/scss/_wysiwyg.scss
@@ -2,6 +2,7 @@
   padding: 34px 16px 16px 24px;
   cursor: text;
   transition: padding .15s cubic-bezier(0, 0, .2, 1) 0ms;
+  box-sizing: border-box;
 
   &:focus {
     outline: none;
diff --git a/app/src/protyle/ui/initUI.ts b/app/src/protyle/ui/initUI.ts
index d04342486..f320a6480 100644
--- a/app/src/protyle/ui/initUI.ts
+++ b/app/src/protyle/ui/initUI.ts
@@ -58,6 +58,10 @@ export const setPadding = (protyle: IProtyle) => {
             min16 = 96
             min24 = 96
         }
+        if (!window.siyuan.config.editor.fullWidth) {
+            // 防止右侧分屏后，左侧页签抖动
+            protyle.wysiwyg.element.style.width = (protyle.element.clientWidth - 10) + "px";
+        }
     }
     if (protyle.options.render.background && protyle.options.render.title) {
         protyle.background.element.lastElementChild.setAttribute("style", `left:${min16}px`);