diff --git a/packages/frontend/core/src/blocksuite/ai/chat-panel/content/pure-text.ts b/packages/frontend/core/src/blocksuite/ai/chat-panel/content/pure-text.ts
index 167f14adf9..610c390195 100644
--- a/packages/frontend/core/src/blocksuite/ai/chat-panel/content/pure-text.ts
+++ b/packages/frontend/core/src/blocksuite/ai/chat-panel/content/pure-text.ts
@@ -40,9 +40,14 @@ export class ChatContentPureText extends ShadowlessElement {
   @property({ attribute: 'data-testid', reflect: true })
   accessor testId = 'chat-content-pure-text';
 
+  stopPropagation(event: Event) {
+    event.stopPropagation();
+  }
+
   protected override render() {
     return this.text.length > 0
-      ? html`<div class="chat-content-pure-text">${this.text}</div>`
+      ? // prettier-ignore
+        html`<div class="chat-content-pure-text" @copy=${this.stopPropagation}>${this.text}</div>`
       : nothing;
   }
 }
diff --git a/packages/frontend/core/src/blocksuite/ai/components/ai-chat-input/ai-chat-input.ts b/packages/frontend/core/src/blocksuite/ai/components/ai-chat-input/ai-chat-input.ts
index af9ca25291..2c5b9acfe7 100644
--- a/packages/frontend/core/src/blocksuite/ai/components/ai-chat-input/ai-chat-input.ts
+++ b/packages/frontend/core/src/blocksuite/ai/components/ai-chat-input/ai-chat-input.ts
@@ -492,6 +492,7 @@ export class AIChatInput extends SignalWatcher(
   };
 
   private readonly _handlePaste = (event: ClipboardEvent) => {
+    event.stopPropagation();
     const items = event.clipboardData?.items;
     if (!items) return;