diff --git a/acceptance_service.py b/acceptance_service.py
index 9e0e5cb..8bbbbff 100644
--- a/acceptance_service.py
+++ b/acceptance_service.py
@@ -1396,6 +1396,11 @@ def _fetch_sources(public_id: str) -> None:
             with connection() as conn:
                 conn.execute("UPDATE acceptance_tasks SET progress_percent=65,updated_at=? WHERE id=?", (now_iso(), task["id"]))
             if initial_analysis_future is not None:
+                # combined 任务的数据分析 Future 已经在运行；先下发截图，二者并行执行。
+                if task["acceptance_method"] == "combined":
+                    run_failures += _execute_acceptance_method(
+                        task["id"], "screenshot", keywords, task["device_count"],
+                    )
                 run_failures += initial_analysis_future.result()
                 new_keywords = [keyword for keyword in keywords if keyword not in initial_keywords]
                 if new_keywords:
@@ -1403,10 +1408,6 @@ def _fetch_sources(public_id: str) -> None:
                         task["id"], "data-analysis", new_keywords,
                         task["cookie_count"] if task["acceptance_method"] == "combined" else task["device_count"],
                     )
-                if task["acceptance_method"] == "combined":
-                    run_failures += _execute_acceptance_method(
-                        task["id"], "screenshot", keywords, task["device_count"],
-                    )
             else:
                 run_failures = _execute_acceptance_method(
                     task["id"], task["acceptance_method"], keywords, task["device_count"]