diff --git a/review_agent/regulatory_info_package/workflow.py b/review_agent/regulatory_info_package/workflow.py
index 6a9f05b..37250ba 100644
--- a/review_agent/regulatory_info_package/workflow.py
+++ b/review_agent/regulatory_info_package/workflow.py
@@ -128,6 +128,7 @@ class RegulatoryInfoPackageWorkflowExecutor:
         self.batch.status = RegulatoryInfoPackageBatch.Status.SUCCESS
         self.batch.finished_at = timezone.now()
         self.batch.save(update_fields=["status", "finished_at"])
+        self._append_completion_message()
         record_event(self.batch, "workflow_completed", {"batch_id": self.batch.pk})
 
     def _nodes(self):
@@ -309,6 +310,42 @@ class RegulatoryInfoPackageWorkflowExecutor:
             )
             return
 
+    def _append_completion_message(self) -> None:
+        if (
+            Message.objects.filter(
+                conversation=self.batch.conversation,
+                role=Message.Role.ASSISTANT,
+                content__contains=self.batch.batch_no,
+            )
+            .filter(content__contains=self.batch.output_zip_name)
+            .exists()
+        ):
+            return
+        exports = list(
+            ExportedSummaryFile.objects.filter(
+                workflow_type=WORKFLOW_TYPE,
+                workflow_batch_id=self.batch.pk,
+            )
+        )
+        exports = sorted(exports, key=lambda export: 0 if export.export_type == ExportedSummaryFile.ExportType.ZIP else 1)
+        content = build_assistant_summary(
+            batch_no=self.batch.batch_no,
+            exports=[
+                {
+                    "file_name": export.file_name,
+                    "download_url": f"/api/review-agent/file-summary/exports/{export.pk}/download/",
+                    "export_type": export.export_type,
+                }
+                for export in exports
+            ],
+            failed_files=[item for item in self.batch.generated_files if item.get("status") == "failed"],
+        )
+        Message.objects.create(
+            conversation=self.batch.conversation,
+            role=Message.Role.ASSISTANT,
+            content=content,
+        )
+
     def _create_export(self, *, path: str, export_type: str, export_category: str) -> ExportedSummaryFile:
         from pathlib import Path
 
diff --git a/tests/test_regulatory_info_package_workflow.py b/tests/test_regulatory_info_package_workflow.py
index fc1331f..4f2b699 100644
--- a/tests/test_regulatory_info_package_workflow.py
+++ b/tests/test_regulatory_info_package_workflow.py
@@ -1,6 +1,8 @@
+from pathlib import Path
+
 import pytest
 
-from review_agent.models import Conversation, RegulatoryInfoPackageBatch, WorkflowNodeRun
+from review_agent.models import Conversation, FileAttachment, Message, RegulatoryInfoPackageBatch, WorkflowNodeRun
 from review_agent.regulatory_info_package.constants import (
     REGULATORY_INFO_PACKAGE_NODE_DEFINITIONS,
     WORKFLOW_TYPE,
@@ -60,3 +62,31 @@ def test_empty_workflow_skeleton_completes(django_user_model, settings):
         status=WorkflowNodeRun.Status.SUCCESS,
     ).count() == len(REGULATORY_INFO_PACKAGE_NODE_DEFINITIONS)
 
+
+def test_completed_workflow_appends_download_summary_message(django_user_model, settings):
+    settings.REGULATORY_INFO_PACKAGE_ASYNC = False
+    user = django_user_model.objects.create_user(username="owner", password="pass")
+    conversation = Conversation.objects.create(user=user, title="会话")
+    trigger = Message.objects.create(conversation=conversation, role=Message.Role.USER, content="根据说明书生成第1章监管信息")
+    source = Path("docs/0.原始材料/目标产品说明书.docx").resolve()
+    attachment = FileAttachment.objects.create(
+        conversation=conversation,
+        user=user,
+        original_name="目标产品说明书.docx",
+        storage_path=str(source),
+        file_size=source.stat().st_size,
+    )
+    batch = create_regulatory_info_package_batch(
+        conversation=conversation,
+        user=user,
+        trigger_message=trigger,
+        source_attachment=attachment,
+        source_file_name=attachment.original_name,
+        source_storage_path=attachment.storage_path,
+    )
+
+    start_regulatory_info_package_workflow(batch, async_run=False)
+
+    message = conversation.messages.filter(role=Message.Role.ASSISTANT, content__contains=batch.batch_no).latest("id")
+    assert "第1章 监管信息(预生成版).zip" in message.content
+    assert "/api/review-agent/file-summary/exports/" in message.content