diff --git a/docs/source/export.md b/docs/source/export.md
index 32b9cadbb..edad3428d 100644
--- a/docs/source/export.md
+++ b/docs/source/export.md
@@ -63,12 +63,14 @@ export_config {
 #### Local
 
 ```bash
-python -m easy_rec.python.export --pipeline_config_path dwd_avazu_ctr_deepmodel.config --export_dir ./export
+python -m easy_rec.python.export --pipeline_config_path dwd_avazu_ctr_deepmodel.config --export_dir ./export --export_done_file EXPORT_DONE
 ```
 
 - --pipeline_config_path: config文件路径
 - --model_dir: 如果指定了model_dir将会覆盖config里面的model_dir，一般在周期性调度的时候使用
 - --export_dir: 导出的目录
+- --export_done_file: 导出完成标志文件名, 导出完成后，在导出目录下创建一个文件表示导出完成了
+- --clear_export: 删除旧的导出文件目录
 
 #### PAI
 
@@ -92,3 +94,7 @@ pai -name easy_rec_ext -project algo_public
 - -Dbuckets: config所在的bucket和保存模型的bucket; 如果有多个bucket，逗号分割
 - 如果是pai内部版,则不需要指定arn和ossHost, arn和ossHost放在-Dbuckets里面
   - -Dbuckets=oss://easyrec/?role_arn=acs:ram::xxx:role/ev-ext-test-oss&host=oss-cn-beijing-internal.aliyuncs.com
+- -Dextra_params: 其它参数, 没有在pai -name easy_rec_ext中定义的参数, 可以通过extra_params传入, 如:
+  - --export_done_file: 导出完成标志文件名, 导出完成后，在导出目录下创建一个文件表示导出完成了
+  - --clear_export: 删除旧的导出文件目录
+  - --place_embedding_on_cpu: 将embedding相关的操作放在cpu上，有助于提升模型在gpu环境下的推理速度
diff --git a/easy_rec/python/export.py b/easy_rec/python/export.py
index d39db74ea..b5d42e65e 100644
--- a/easy_rec/python/export.py
+++ b/easy_rec/python/export.py
@@ -5,6 +5,7 @@
 
 import tensorflow as tf
 from tensorflow.python.lib.io import file_io
+from tensorflow.python.platform import gfile
 
 from easy_rec.python.main import export
 from easy_rec.python.protos.train_pb2 import DistributionStrategy
@@ -57,6 +58,10 @@
 
 tf.app.flags.DEFINE_string('model_dir', None, help='will update the model_dir')
 tf.app.flags.mark_flag_as_required('export_dir')
+
+tf.app.flags.DEFINE_bool('clear_export', False, 'remove export_dir if exists')
+tf.app.flags.DEFINE_string('export_done_file', '',
+                           'a flag file to signal that export model is done')
 FLAGS = tf.app.flags.FLAGS
 
 
@@ -121,8 +126,20 @@ def main(argv):
     estimator_utils.init_hvd()
     estimator_utils.init_sok()
 
-  export(FLAGS.export_dir, pipeline_config_path, FLAGS.checkpoint_path,
-         FLAGS.asset_files, FLAGS.verbose, **extra_params)
+  if FLAGS.clear_export:
+    logging.info('will clear export_dir=%s' % FLAGS.export_dir)
+    if gfile.IsDirectory(FLAGS.export_dir):
+      gfile.DeleteRecursively(FLAGS.export_dir)
+
+  export_out_dir = export(FLAGS.export_dir, pipeline_config_path,
+                          FLAGS.checkpoint_path, FLAGS.asset_files,
+                          FLAGS.verbose, **extra_params)
+
+  if FLAGS.export_done_file:
+    flag_file = os.path.join(export_out_dir, FLAGS.export_done_file)
+    logging.info('create export done file: %s' % flag_file)
+    with gfile.GFile(flag_file, 'w') as fout:
+      fout.write('ExportDone')
 
 
 if __name__ == '__main__':
diff --git a/easy_rec/python/inference/odps_predictor.py b/easy_rec/python/inference/odps_predictor.py
index 36c3f9da3..183fc4d13 100644
--- a/easy_rec/python/inference/odps_predictor.py
+++ b/easy_rec/python/inference/odps_predictor.py
@@ -6,7 +6,7 @@
 
 import tensorflow as tf
 
-from easy_rec.python.inference import Predictor
+from easy_rec.python.inference.predictor import Predictor
 
 
 class ODPSPredictor(Predictor):
diff --git a/easy_rec/python/main.py b/easy_rec/python/main.py
index ff54bf9c7..6b8e8eb2b 100644
--- a/easy_rec/python/main.py
+++ b/easy_rec/python/main.py
@@ -14,6 +14,7 @@
 import six
 import tensorflow as tf
 from tensorflow.core.protobuf import saved_model_pb2
+from tensorflow.python.platform import gfile
 
 import easy_rec
 from easy_rec.python.builders import strategy_builder
@@ -41,7 +42,6 @@
   hvd = None
 
 if tf.__version__ >= '2.0':
-  gfile = tf.compat.v1.gfile
   from tensorflow.core.protobuf import config_pb2
 
   ConfigProto = config_pb2.ConfigProto
@@ -49,7 +49,6 @@
 
   tf = tf.compat.v1
 else:
-  gfile = tf.gfile
   GPUOptions = tf.GPUOptions
   ConfigProto = tf.ConfigProto
 
diff --git a/easy_rec/python/test/export_test.py b/easy_rec/python/test/export_test.py
index 80a81a3dc..23bff2890 100644
--- a/easy_rec/python/test/export_test.py
+++ b/easy_rec/python/test/export_test.py
@@ -10,6 +10,7 @@
 
 import numpy as np
 import tensorflow as tf
+from tensorflow.python.platform import gfile
 
 import easy_rec
 from easy_rec.python.inference.predictor import Predictor
@@ -17,11 +18,6 @@
 from easy_rec.python.utils import test_utils
 from easy_rec.python.utils.test_utils import RunAsSubprocess
 
-if tf.__version__ >= '2.0':
-  gfile = tf.compat.v1.gfile
-else:
-  gfile = tf.gfile
-
 
 class ExportTest(tf.test.TestCase):
 
@@ -119,6 +115,7 @@ def test_export_with_asset(self):
         --pipeline_config_path %s
         --export_dir %s
         --asset_files fg.json:samples/model_config/taobao_fg.json
+        --export_done_file ExportDone
     """ % (
         config_path,
         export_dir,
@@ -131,6 +128,7 @@ def test_export_with_asset(self):
     export_dir = files[0]
     assert gfile.Exists(export_dir + '/assets/taobao_fg.json')
     assert gfile.Exists(export_dir + '/assets/pipeline.config')
+    assert gfile.Exists(export_dir + '/ExportDone')
 
   def test_export_with_out_in_ckpt_config(self):
     test_dir = test_utils.get_tmp_dir()
diff --git a/easy_rec/python/utils/export_big_model.py b/easy_rec/python/utils/export_big_model.py
index 6d074581a..243847a5f 100644
--- a/easy_rec/python/utils/export_big_model.py
+++ b/easy_rec/python/utils/export_big_model.py
@@ -263,6 +263,7 @@ def export_big_model(export_dir, pipeline_config, redis_params,
   export_dir = os.path.join(export_dir,
                             meta_graph_def.meta_info_def.meta_graph_version)
   export_dir = io_util.fix_oss_dir(export_dir)
+  logging.info('export_dir=%s' % export_dir)
   if Exists(export_dir):
     logging.info('will delete old dir: %s' % export_dir)
     DeleteRecursively(export_dir)
@@ -304,7 +305,7 @@ def export_big_model(export_dir, pipeline_config, redis_params,
 
   # remove temporary files
   Remove(embed_name_to_id_file)
-  return
+  return export_dir
 
 
 def export_big_model_to_oss(export_dir, pipeline_config, oss_params,
@@ -553,6 +554,7 @@ def export_big_model_to_oss(export_dir, pipeline_config, oss_params,
   export_dir = os.path.join(export_dir,
                             meta_graph_def.meta_info_def.meta_graph_version)
   export_dir = io_util.fix_oss_dir(export_dir)
+  logging.info('export_dir=%s' % export_dir)
   if Exists(export_dir):
     logging.info('will delete old dir: %s' % export_dir)
     DeleteRecursively(export_dir)
@@ -625,4 +627,4 @@ def export_big_model_to_oss(export_dir, pipeline_config, oss_params,
 
   # remove temporary files
   Remove(embed_name_to_id_file)
-  return
+  return export_dir
diff --git a/pai_jobs/run.py b/pai_jobs/run.py
index 986731d36..309ec4e7a 100644
--- a/pai_jobs/run.py
+++ b/pai_jobs/run.py
@@ -12,7 +12,7 @@
 from tensorflow.python.platform import gfile
 
 import easy_rec
-from easy_rec.python.inference.predictor import ODPSPredictor
+from easy_rec.python.inference.odps_predictor import ODPSPredictor
 from easy_rec.python.inference.vector_retrieve import VectorRetrieve
 from easy_rec.python.tools.pre_check import run_check
 from easy_rec.python.utils import config_util
@@ -110,6 +110,8 @@
 tf.app.flags.DEFINE_string('export_dir', '',
                            'directory where model should be exported to')
 tf.app.flags.DEFINE_bool('clear_export', False, 'remove export_dir if exists')
+tf.app.flags.DEFINE_string('export_done_file', '',
+                           'a flag file to signal that export model is done')
 tf.app.flags.DEFINE_integer('max_wait_ckpt_ts', 0,
                             'max wait time in seconds for checkpoints')
 tf.app.flags.DEFINE_boolean('continue_train', True,
@@ -495,8 +497,14 @@ def main(argv):
 
     extra_params = redis_params
     extra_params.update(oss_params)
-    easy_rec.export(export_dir, pipeline_config, FLAGS.checkpoint_path,
-                    FLAGS.asset_files, FLAGS.verbose, **extra_params)
+    export_out_dir = easy_rec.export(export_dir, pipeline_config,
+                                     FLAGS.checkpoint_path, FLAGS.asset_files,
+                                     FLAGS.verbose, **extra_params)
+    if FLAGS.export_done_file:
+      flag_file = os.path.join(export_out_dir, FLAGS.export_done_file)
+      logging.info('create export done file: %s' % flag_file)
+      with gfile.GFile(flag_file, 'w') as fout:
+        fout.write('ExportDone')
   elif FLAGS.cmd == 'predict':
     check_param('tables')
     check_param('saved_model_dir')