diff --git a/fluid/PaddleCV/yolov3/reader.py b/fluid/PaddleCV/yolov3/reader.py
index 573480f8ce5023e99e3e51176fd08b3231281e2e..b85852ef381ea5d41124beed617a58c4bcec1525 100644
--- a/fluid/PaddleCV/yolov3/reader.py
+++ b/fluid/PaddleCV/yolov3/reader.py
@@ -115,7 +115,7 @@ class DataSetReader(object):
         image_ids = self.COCO.getImgIds()
         image_ids.sort()
         imgs = copy.deepcopy(self.COCO.loadImgs(image_ids))
-        # imgs = imgs[:8]
+        imgs = imgs[-8:]
         for img in imgs:
             img['image'] = os.path.join(self.img_dir, img['file_name'])
             assert os.path.exists(img['image']), \
@@ -247,9 +247,13 @@ def train(size=416,
           interval=10,
           pyreader_num=1,
           num_workers=16,
-          max_queue=32):
+          max_queue=32,
+          use_multiprocessing=True):
     generator = dsr.get_reader('train', size, batch_size, shuffle, random_shape_iter, random_sizes)
 
+    if not use_multiprocessing:
+        return generator
+
     def infinite_reader():
         while True:
             for data in generator():
diff --git a/fluid/PaddleCV/yolov3/train.py b/fluid/PaddleCV/yolov3/train.py
index 5e4b0ca246eaa83b7c72c45b06143d396c8295e2..90bfeec418fc2c1aa6088390ecc5f4a4f2b655e8 100644
--- a/fluid/PaddleCV/yolov3/train.py
+++ b/fluid/PaddleCV/yolov3/train.py
@@ -96,11 +96,11 @@ def train():
 
     random_shape_iter = cfg.max_iter - cfg.start_iter - cfg.tune_iter
     if cfg.use_pyreader:
-        train_reader = reader.train(input_size, batch_size=int(hyperparams['batch'])/devices_num, shuffle=True, random_shape_iter=random_shape_iter, random_sizes=random_sizes, interval=10, pyreader_num=devices_num)
+        train_reader = reader.train(input_size, batch_size=int(hyperparams['batch'])/devices_num, shuffle=True, random_shape_iter=random_shape_iter, random_sizes=random_sizes, interval=10, pyreader_num=devices_num,use_multiprocessing=cfg.use_multiprocess)
         py_reader = model.py_reader
         py_reader.decorate_paddle_reader(train_reader)
     else:
-        train_reader = reader.train(input_size, batch_size=int(hyperparams['batch']), shuffle=True, random_shape_iter=random_shape_iter, random_sizes=random_sizes, interval=10)
+        train_reader = reader.train(input_size, batch_size=int(hyperparams['batch']), shuffle=True, random_shape_iter=random_shape_iter, random_sizes=random_sizes, interval=10,use_multiprocessing=cfg.use_multiprocess)
         feeder = fluid.DataFeeder(place=place, feed_list=model.feeds())
 
     def save_model(postfix):
diff --git a/fluid/PaddleCV/yolov3/utility.py b/fluid/PaddleCV/yolov3/utility.py
index e489b750e81319da00b454f17d3e9b5d3f487d99..3064c10151b3f32142b765511cf38c42f52c0500 100644
--- a/fluid/PaddleCV/yolov3/utility.py
+++ b/fluid/PaddleCV/yolov3/utility.py
@@ -106,6 +106,7 @@ def parse_args():
     add_arg('use_pyreader',     bool,   True,           "Use pyreader.")
     add_arg('use_profile',      bool,   False,       "Whether use profiler.")
     add_arg('start_iter',       int,    0,     "Start iteration.")
+    add_arg('use_multiprocess', bool,   True, "add multiprocess.")
     #SOLVER
     add_arg('learning_rate',    float,  0.001,     "Learning rate.")
     add_arg('max_iter',         int,    500200,   "Iter number.")