diff --git a/paddle/fluid/framework/device_worker.cc b/paddle/fluid/framework/device_worker.cc
index e3115b58f1fb1912b5f47e3265975a2d60b1f272..4aa1690030eab5d957f3d13154a41db97167265a 100644
--- a/paddle/fluid/framework/device_worker.cc
+++ b/paddle/fluid/framework/device_worker.cc
@@ -458,6 +458,7 @@ void DeviceWorker::DumpField(const Scope& scope,
     }
     writer_ << ars[i];
   }
+  writer_.Flush();
 }
 
 }  // namespace framework