diff --git a/codes/train.py b/codes/train.py
index 690300f5..b9aa82c4 100644
--- a/codes/train.py
+++ b/codes/train.py
@@ -110,6 +110,8 @@ class Trainer:
                 self.dataset_debugger = get_dataset_debugger(dataset_opt)
                 if self.dataset_debugger is not None and resume_state is not None:
                     self.dataset_debugger.load_state(opt_get(resume_state, ['dataset_debugger_state'], {}))
+                if len(self.train_set) <= dataset_opt['batch_size']:
+                    raise Exception("dataset size is less than batch size, consider reducing your batch size, or increasing your dataset.")
                 train_size = int(math.ceil(len(self.train_set) / dataset_opt['batch_size']))
                 total_iters = int(opt['train']['niter'])
                 self.total_epochs = int(math.ceil(total_iters / train_size))