diff --git a/train.py b/train.py
index 64ed193844d17ad6204c208790c69e54ae3c4373..242be509cf2a85d115b0f679ce53fbd983ec8010 100644
--- a/train.py
+++ b/train.py
@@ -63,6 +63,7 @@ if __name__ == "__main__":
                              False, Cuda)
     epoch_size = num_train // Batch_size
 
+
     if True:
         # ------------------------------------#
         #   冻结一定部分训练
@@ -76,8 +77,11 @@ if __name__ == "__main__":
                 adjust_learning_rate(optimizer,lr,0.9,epoch)
             loc_loss = 0
             conf_loss = 0
-            for iteration in range(epoch_size):
-                images, targets = next(gen)
+            for iteration, batch in enumerate(gen):
+                if iteration >= epoch_size:
+                    break
+                start_time = time.time()
+                images, targets = batch[0], batch[1]
                 with torch.no_grad():
                     if Cuda:
                         images = Variable(torch.from_numpy(images).type(torch.FloatTensor)).cuda()
@@ -118,8 +122,11 @@ if __name__ == "__main__":
                 adjust_learning_rate(optimizer,freeze_lr,0.9,epoch)
             loc_loss = 0
             conf_loss = 0
-            for iteration in range(epoch_size):
-                images, targets = next(gen)
+            for iteration, batch in enumerate(gen):
+                if iteration >= epoch_size:
+                    break
+                start_time = time.time()
+                images, targets = batch[0], batch[1]
                 with torch.no_grad():
                     if Cuda:
                         images = Variable(torch.from_numpy(images).type(torch.FloatTensor)).cuda()