diff --git a/packages/editor/src/layouts/props-panel/PropsPanel.vue b/packages/editor/src/layouts/props-panel/PropsPanel.vue
index baaa8dea..d1ab7d62 100644
--- a/packages/editor/src/layouts/props-panel/PropsPanel.vue
+++ b/packages/editor/src/layouts/props-panel/PropsPanel.vue
@@ -164,17 +164,25 @@ const submit = async (
     };
 
     if (v.style) {
-      Object.entries(v.style).forEach(([key, value]) => {
-        if (value !== '' && newValue.style) {
-          newValue.style[key] = value;
-        }
-      });
+      // 空字符串样式值表示「清除该样式」，需保留才能在 doUpdate 的 mergeWith 中覆盖旧值。
+      if (eventData) {
+        // 表单编辑：先过滤掉空字符串（避免表单默认空值污染 DSL），
+        // 再按 changeRecords 恢复被主动清空的字段。
+        Object.entries(v.style).forEach(([key, value]) => {
+          if (value !== '' && newValue.style) {
+            newValue.style[key] = value;
+          }
+        });
 
-      eventData?.changeRecords?.forEach((record) => {
-        if (record.propPath?.startsWith('style') && record.value === '') {
-          setValueByKeyPath(record.propPath, record.value, newValue);
-        }
-      });
+        eventData.changeRecords?.forEach((record) => {
+          if (record.propPath?.startsWith('style') && record.value === '') {
+            setValueByKeyPath(record.propPath, record.value, newValue);
+          }
+        });
+      } else {
+        // 源码编辑器保存（无 eventData）：style 原样保留，其中的空字符串视为用户主动清除该样式。
+        newValue.style = { ...v.style };
+      }
     }
 
     // 区分操作途径：表单字段编辑（MForm @change）会带上 eventData（含 changeRecords）；
diff --git a/packages/editor/tests/unit/layouts/props-panel/PropsPanel.spec.ts b/packages/editor/tests/unit/layouts/props-panel/PropsPanel.spec.ts
index 64d2a7fa..1ab43ee7 100644
--- a/packages/editor/tests/unit/layouts/props-panel/PropsPanel.spec.ts
+++ b/packages/editor/tests/unit/layouts/props-panel/PropsPanel.spec.ts
@@ -95,7 +95,7 @@ vi.mock('@editor/layouts/props-panel/FormPanel.vue', () => ({
           // 模拟 CodeEditor 源码保存：仅传 values，无 eventData、无 error（对应 saveCode 路径）
           h('button', {
             class: 'code-save-btn',
-            onClick: () => emit('submit', { id: 'n1', style: { color: 'red' } }),
+            onClick: () => emit('submit', { id: 'n1', style: { color: 'red', width: '' } }),
           }),
           h('button', { class: 'submit-err-btn', onClick: () => emit('submit-error', new Error('e')) }),
           h('button', { class: 'form-err-btn', onClick: () => emit('form-error', new Error('e')) }),
@@ -239,6 +239,16 @@ describe('PropsPanel', () => {
     expect(options.historySource).toBe('code');
   });
 
+  test('CodeEditor 源码保存时 style 中的空字符串值被保留（表示清除该样式）', async () => {
+    const wrapper = mount(PropsPanel, { props: {} as any });
+    await new Promise((r) => setTimeout(r, 0));
+    await wrapper.find('.code-save-btn').trigger('click');
+
+    const calledNode = (editorService.update.mock.calls[0] as any)[0];
+    expect(calledNode.style.color).toBe('red');
+    expect(calledNode.style.width).toBe('');
+  });
+
   test('mounted 事件 emit', async () => {
     const wrapper = mount(PropsPanel, { props: {} as any });
     await wrapper.find('.mounted-btn').trigger('click');