diff --git a/packages/docs-ui/src/services/selection/__tests__/doc-selection-render.service.spec.ts b/packages/docs-ui/src/services/selection/__tests__/doc-selection-render.service.spec.ts
index 6ed2dc590d..351ea4db1c 100644
--- a/packages/docs-ui/src/services/selection/__tests__/doc-selection-render.service.spec.ts
+++ b/packages/docs-ui/src/services/selection/__tests__/doc-selection-render.service.spec.ts
@@ -1300,6 +1300,7 @@ describe('DocSelectionRenderService', () => {
         };
         const { renderUnit, service, univer } = createRealSelectionRenderService({ scene });
         cleanup.push(() => renderUnit.dispose(), () => univer.dispose());
+        vi.spyOn(TestLayoutService.root, 'getBoundingClientRect').mockReturnValue({ left: 100, top: 200 } as DOMRect);
         const activeRange = {
             isActive: () => true,
             getAnchor: () => ({ left: 12, top: 20, visible: true }),
@@ -1315,6 +1316,19 @@ describe('DocSelectionRenderService', () => {
         expect(container.style.zIndex).toBe('1000');
     });
 
+    it('converts the hidden editor position for a fixed containing block', () => {
+        const { renderUnit, service, univer } = createRealSelectionRenderService();
+        cleanup.push(() => renderUnit.dispose(), () => univer.dispose());
+        const container = document.getElementById('univer-doc-selection-container-selection-render-doc')!;
+        vi.spyOn(container, 'offsetParent', 'get').mockReturnValue(TestLayoutService.root);
+        vi.spyOn(TestLayoutService.root, 'getBoundingClientRect').mockReturnValue({ left: 100, top: 200 } as DOMRect);
+
+        service.activate(35, 47);
+
+        expect(container.style.left).toBe('-65px');
+        expect(container.style.top).toBe('-153px');
+    });
+
     it('parks the active selection while scrolling and restores the editor when the selection remains in view', () => {
         getCanvasOffsetByEngineMock.mockReturnValue({ left: 1, top: 2 });
         const scrollAfter$ = new TestRenderEvent<{ viewport: unknown }>();
diff --git a/packages/docs-ui/src/services/selection/doc-selection-render.service.ts b/packages/docs-ui/src/services/selection/doc-selection-render.service.ts
index cf267a0242..52d9e0d688 100644
--- a/packages/docs-ui/src/services/selection/doc-selection-render.service.ts
+++ b/packages/docs-ui/src/services/selection/doc-selection-render.service.ts
@@ -372,16 +372,13 @@ export class DocSelectionRenderService extends RxDisposable implements IRenderMo
         this._updateInputPosition();
     }
 
-    /**
-     * @deprecated
-     */
     activate(x: number, y: number, force = false) {
         // Keep the hidden editor inside the Portal subtree when possible to avoid focus-trap loops,
         // then compensate coordinates if a transformed ancestor changes the fixed containing block.
         this._ensureHostContainer();
         let left = x;
         let top = y;
-        const fixedContainer = this._container.parentElement;
+        const fixedContainer = this._container.offsetParent;
         if (fixedContainer) {
             const rect = fixedContainer.getBoundingClientRect();
             left -= rect.left;