diff --git a/app/src/config/editor.ts b/app/src/config/editor.ts
index 7feb41b57..edb74f9d2 100644
--- a/app/src/config/editor.ts
+++ b/app/src/config/editor.ts
@@ -196,6 +196,11 @@ export const editor = {
         getAllModels().editor.forEach((item) => {
             item.editor.reload();
             setPadding(item.editor.protyle);
+            if (window.siyuan.config.editor.fullWidth) {
+                item.editor.protyle.wysiwyg.element.setAttribute("data-fullwidth", "true");
+            } else {
+                item.editor.protyle.wysiwyg.element.removeAttribute("data-fullwidth");
+            }
         });
         setInlineStyle();
     }
diff --git a/app/src/protyle/wysiwyg/index.ts b/app/src/protyle/wysiwyg/index.ts
index e548a76f0..21d03a71a 100644
--- a/app/src/protyle/wysiwyg/index.ts
+++ b/app/src/protyle/wysiwyg/index.ts
@@ -78,6 +78,9 @@ export class WYSIWYG {
         if (window.siyuan.config.editor.displayBookmarkIcon) {
             this.element.classList.add("protyle-wysiwyg--attr");
         }
+        if (window.siyuan.config.editor.fullWidth) {
+            this.element.setAttribute("data-fullwidth", "true");
+        }
         this.bindEvent(protyle);
         keydown(protyle, this.element);
         dropEvent(protyle, this.element);
@@ -87,14 +90,14 @@ export class WYSIWYG {
         const ialKeys = Object.keys(ial);
         for (let i = 0; i < this.element.attributes.length; i++) {
             const oldKey = this.element.attributes[i].nodeName;
-            if (!["type", "class", "spellcheck", "contenteditable", "data-doc-type", "style"].includes(oldKey) &&
+            if (!["type", "class", "spellcheck", "contenteditable", "data-doc-type", "data-fullwidth", "style"].includes(oldKey) &&
                 !ialKeys.includes(oldKey)) {
                 this.element.removeAttribute(oldKey);
                 i--;
             }
         }
         ialKeys.forEach((key: string) => {
-            if (!["title-img", "title", "updated", "icon", "id", "type", "class", "spellcheck", "contenteditable", "data-doc-type", "style"].includes(key)) {
+            if (!["title-img", "title", "updated", "icon", "id", "type", "class", "spellcheck", "contenteditable", "data-doc-type", "data-fullwidth", "style"].includes(key)) {
                 this.element.setAttribute(key, ial[key]);
             }
         });