diff --git a/collie/controller/trainer.py b/collie/controller/trainer.py
index 9c082ce..cb9c465 100644
--- a/collie/controller/trainer.py
+++ b/collie/controller/trainer.py
@@ -7,6 +7,7 @@
 import json
 import logging
 import os
+import random
 from collections import OrderedDict
 from functools import reduce
 from typing import Any, Callable, Dict, Iterable, List, Optional, Sequence, Tuple, Union
@@ -26,7 +27,7 @@
 from collie.callbacks.callback import Callback
 from collie.callbacks.callback_manager import CallbackManager, prepare_callback
 from collie.config import CollieConfig
-from collie.data import CollieDataLoader
+from collie.data import CollieDataLoader, CollieDatasetForTraining
 from collie.driver.io import IODriver
 from collie.log import logger
 from collie.models.base import CollieModelForCausalLM
@@ -316,6 +317,52 @@ def setup_parallel_model(self):
         )
         deepspeed.utils.logging.logger.setLevel(deepspeed_logging_level)
 
+    def dummy_train_loop(self, max_length:Optional[int] = None):
+        r"""
+        对根据用户设置的batchsize和max_length构造两个batch的数据试跑两个epoch测试；
+        如果dataset中未设置max_length值，则需用户手动设置max_length值来构造测试用例；
+        """
+        if not max_length:
+            max_length = self.train_dataset.max_length
+        if max_length > 0:
+            batch_size = self.config.train_micro_batch_size
+            dataset = []
+            for _ in range(2):
+                batch = []
+                for _ in range(batch_size):
+                    tokens = torch.randint(500, 10000, (1, max_length))[0]
+                    labels = [-100] * max_length
+                    sample = {
+                        "tokens": tokens,
+                        "labels": labels
+                    }
+                    batch.append(sample)
+                dataset += batch
+            dataset = CollieDatasetForTraining(dataset)
+            dataloader = CollieDataLoader(
+                    dataset,
+                    batch_size,
+                    self.config.gradient_accumulation_steps,
+                    shuffle=True,
+                    collate_fn=self.train_dataset_collate_fn,
+                    drop_last=False,
+                    num_workers=self.config.dataloader_num_workers,
+                )
+            for epoch in range(2):
+                for batch_idx, batch in enumerate(dataloader):
+                    try:
+                        loss = self.train_fn(self, batch, self.global_batch_idx)
+                    except RuntimeError as e:
+                        if 'out of memory' in str(e):
+                            print("OOM error occurred at epoch:", epoch, "batch index:", batch_idx)
+                            print("Please reduce the batch size or max_length size")
+                            torch.cuda.empty_cache()
+                        else:
+                            raise e
+            logger.info('Success finish dummy_train_loop.')     
+        else:
+            logger.error('The max_length value is not set in the dataset and needs to be manually passed in for testing.')
+        
     def train(self, dataloader: Optional[Iterable] = None):
         """训练循环
 
@@ -691,40 +738,51 @@ def save_model(
             except Exception as e:
                 logger.rank_zero_warning("Save config and tokenizer failed")
                 logger.rank_zero_warning(str(e))
-
-        if isinstance(self.engine.module, CollieModelForCausalLM) or isinstance(
-            self.engine.module, PipelineModel
+        
+        if isinstance(self.model, PeftModel):
+            self.save_peft(
+                path=path,
+                protocol=protocol,
+                process_exclusion=process_exclusion,
+                **kwargs,
+            )
+            model_to_save = self.engine.module.get_base_model()
+        else:
+            model_to_save = self.engine.module
+        
+        if isinstance(model_to_save, CollieModelForCausalLM) or isinstance(
+            model_to_save, PipelineModel
         ):
             if is_zero3_enabled(self.config):
                 state_dict = {}
                 self._checkpoint_prologue()
-                for name, param in self.engine.module.named_parameters():
+                for name, param in model_to_save.named_parameters():
                     with deepspeed.zero.GatheredParameters(param):
                         if env.dp_rank == 0:
                             state_dict[name] = param.detach().cpu()
                 self._checkpoint_epilogue()
             else:
                 if env.dp_rank == 0:
-                    state_dict = self.engine.module.state_dict()
+                    state_dict = model_to_save.state_dict()
                 else:
                     state_dict = {}
-            self.engine.module.save_parallel_state_dict(
+            model_to_save.save_parallel_state_dict(
                 state_dict=state_dict,
                 path=path,
                 config=self.config,
                 process_exclusion=process_exclusion,
                 protocol=protocol,
             )
-        elif isinstance(self.engine.module, PreTrainedModel):
+        elif isinstance(model_to_save, PreTrainedModel):
             if is_zero3_enabled(self.config):
                 self._checkpoint_prologue()
                 with deepspeed.zero.GatheredParameters(
-                    list(self.engine.module.parameters(recurse=True))
+                    list(model_to_save.parameters(recurse=True))
                 ):
-                    self.engine.module.save_pretrained(save_directory=path, **kwargs)
+                    model_to_save.save_pretrained(save_directory=path, **kwargs)
                 self._checkpoint_epilogue()
             else:
-                self.engine.module.save_pretrained(save_directory=path, **kwargs)
+                model_to_save.save_pretrained(save_directory=path, **kwargs)
 
     def load_model(self, path: str, process_exclusion: bool = False, **kwargs):
         ...