diff --git a/packages/frontend/core/src/blocksuite/presets/ai/utils/editor-actions.ts b/packages/frontend/core/src/blocksuite/presets/ai/utils/editor-actions.ts
index e994a6e49b..8f4e84ee93 100644
--- a/packages/frontend/core/src/blocksuite/presets/ai/utils/editor-actions.ts
+++ b/packages/frontend/core/src/blocksuite/presets/ai/utils/editor-actions.ts
@@ -105,6 +105,7 @@ export const replace = async (
   );
 
   if (textSelection) {
+    host.std.command.exec('deleteText', { textSelection });
     const { snapshot, job } = await markdownToSnapshot(content, host);
     await job.snapshotToSlice(
       snapshot,