diff --git "a/docs/source/Customization/\350\207\252\345\256\232\344\271\211\346\225\260\346\215\256\351\233\206.md" "b/docs/source/Customization/\350\207\252\345\256\232\344\271\211\346\225\260\346\215\256\351\233\206.md"
index aaa018144..b34b10169 100644
--- "a/docs/source/Customization/\350\207\252\345\256\232\344\271\211\346\225\260\346\215\256\351\233\206.md"
+++ "b/docs/source/Customization/\350\207\252\345\256\232\344\271\211\346\225\260\346\215\256\351\233\206.md"
@@ -81,6 +81,7 @@ query-response格式：
 
 微调：
 ```jsonl
+{"messages": [{"role": "user", "content": "浙江的省会在哪？"}, {"role": "assistant", "content": "浙江的省会在杭州。"}]}
 {"messages": [{"role": "user", "content": "<image><image>两张图片有什么区别"}, {"role": "assistant", "content": "前一张是小猫，后一张是小狗"}], "images": ["/xxx/x.jpg", "xxx/x.png"]}
 {"messages": [{"role": "user", "content": "<audio>语音说了什么"}, {"role": "assistant", "content": "今天天气真好呀"}], "audios": ["/xxx/x.mp3"]}
 {"messages": [{"role": "system", "content": "你是个有用无害的助手"}, {"role": "user", "content": "<image>图片中是什么，<video>视频中是什么"}, {"role": "assistant", "content": "图片中是一个大象，视频中是一只小狗在草地上奔跑"}], "images": ["/xxx/x.jpg"], "videos": ["/xxx/x.mp4"]}
diff --git a/docs/source_en/Customization/Custom-dataset.md b/docs/source_en/Customization/Custom-dataset.md
index 6f26382c7..f190e8f47 100644
--- a/docs/source_en/Customization/Custom-dataset.md
+++ b/docs/source_en/Customization/Custom-dataset.md
@@ -74,14 +74,15 @@ For multimodal datasets, the format is the same as the tasks mentioned above. Th
 Pre-training:
 ```jsonl
 {"messages": [{"role": "assistant", "content": "Pre-trained text goes here"}]}
-{"messages": [{"role": "assistant", "content": "<image> is a puppy, <image> is a kitten"}], "images": ["/xxx/x.jpg", "/xxx/x.png"]}
-{"messages": [{"role": "assistant", "content": "<audio> describes how nice the weather is today"}], "audios": ["/xxx/x.wav"]}
-{"messages": [{"role": "assistant", "content": "<image> is an elephant, <video> is a lion running"}], "images": ["/xxx/x.jpg"], "videos": ["/xxx/x.mp4"]}
+{"messages": [{"role": "assistant", "content": "<image>is a puppy, <image>is a kitten"}], "images": ["/xxx/x.jpg", "/xxx/x.png"]}
+{"messages": [{"role": "assistant", "content": "<audio>describes how nice the weather is today"}], "audios": ["/xxx/x.wav"]}
+{"messages": [{"role": "assistant", "content": "<image>is an elephant, <video>is a lion running"}], "images": ["/xxx/x.jpg"], "videos": ["/xxx/x.mp4"]}
 ```
 
 Supervised Fine-tuning:
 
 ```jsonl
+{"messages": [{"role": "user", "content": "Where is the capital of Zhejiang?"}, {"role": "assistant", "content": "The capital of Zhejiang is Hangzhou."}]}
 {"messages": [{"role": "user", "content": "<image><image>What is the difference between the two images?"}, {"role": "assistant", "content": "The first one is a kitten, and the second one is a puppy."}], "images": ["/xxx/x.jpg", "xxx/x.png"]}
 {"messages": [{"role": "user", "content": "<audio>What did the audio say?"}, {"role": "assistant", "content": "The weather is really nice today."}], "audios": ["/xxx/x.mp3"]}
 {"messages": [{"role": "system", "content": "You are a helpful and harmless assistant."}, {"role": "user", "content": "<image>What is in the image, <video>What is in the video?"}, {"role": "assistant", "content": "The image shows an elephant, and the video shows a puppy running on the grass."}], "images": ["/xxx/x.jpg"], "videos": ["/xxx/x.mp4"]}
@@ -93,7 +94,7 @@ The data format for RLHF can refer to the format used for pure text large models
 For grounding (object detection) tasks, SWIFT supports two methods:
 1. Maintain consistency with the above multimodal dataset format, adding special characters in the dataset, for example:
 ```jsonl
-{"messages": [{"role": "system", "content": "You are a useful and harmless assistant"}, {"role": "user", "content": "<image> Find a <ref> elephant </ref>"}, {"role": "assistant", "content": "<box>(200,450),(500,800)</box>"}], "images": ["/xxx/x.jpg"]}
+{"messages": [{"role": "system", "content": "You are a useful and harmless assistant"}, {"role": "user", "content": "<image>Find a <ref> elephant </ref>"}, {"role": "assistant", "content": "<box>(200,450),(500,800)</box>"}], "images": ["/xxx/x.jpg"]}
 ```
 With this type of data, please note:
   - Grounding tasks often require special characters. You need to determine which model to use, read the model paper to identify special characters for grounding tasks, and combine the data accordingly.
@@ -104,9 +105,9 @@ With this type of data, please note:
 
 ```jsonl
 # Object detection
-{"messages": [{"role": "system", "content": "You are a useful and harmless assistant"}, {"role": "user", "content": "<image> Identify <bbox>"}, {"role": "assistant", "content": "<ref-object>"}], "images": ["/coco2014/train2014/COCO_train2014_000000001507.jpg"], "objects": "[{\"caption\": \"guy in red\", \"bbox\": [138, 136, 235, 359], \"bbox_type\": \"real\", \"image\": 0}]"}
+{"messages": [{"role": "system", "content": "You are a useful and harmless assistant"}, {"role": "user", "content": "<image>Identify <bbox>"}, {"role": "assistant", "content": "<ref-object>"}], "images": ["/coco2014/train2014/COCO_train2014_000000001507.jpg"], "objects": "[{\"caption\": \"guy in red\", \"bbox\": [138, 136, 235, 359], \"bbox_type\": \"real\", \"image\": 0}]"}
 # Grounding to multiple bboxes
-{"messages": [{"role": "system", "content": "You are a useful and harmless assistant"}, {"role": "user", "content": "<image> Find <ref-object>"}, {"role": "assistant", "content": "<bbox>"}], "images": ["/coco2014/train2014/COCO_train2014_000000001507.jpg"], "objects": "[{\"caption\": \"guy in red\", \"bbox\": [[138, 136, 235, 359], [1,2,3,4]], \"bbox_type\": \"real\", \"image\": 0}]"}
+{"messages": [{"role": "system", "content": "You are a useful and harmless assistant"}, {"role": "user", "content": "<image>Find <ref-object>"}, {"role": "assistant", "content": "<bbox>"}], "images": ["/coco2014/train2014/COCO_train2014_000000001507.jpg"], "objects": "[{\"caption\": \"guy in red\", \"bbox\": [[138, 136, 235, 359], [1,2,3,4]], \"bbox_type\": \"real\", \"image\": 0}]"}
 ```
 
 This format adds the objects field, which includes:
diff --git a/swift/llm/template/base.py b/swift/llm/template/base.py
index c15ac3816..f939ff916 100644
--- a/swift/llm/template/base.py
+++ b/swift/llm/template/base.py
@@ -685,7 +685,7 @@ def pre_forward_hook(self, model: nn.Module, args, kwargs):
             kwargs.pop('input_ids', None)
 
         if isinstance(model, PeftModel):
-            parameters = inspect.signature(model.base_model.model.forward).parameters
+            parameters = inspect.signature(model.model.forward).parameters
         else:
             parameters = inspect.signature(model.forward).parameters
         if 'position_ids' not in parameters:
diff --git a/swift/llm/train/tuner.py b/swift/llm/train/tuner.py
index 21d097b40..20274161d 100644
--- a/swift/llm/train/tuner.py
+++ b/swift/llm/train/tuner.py
@@ -153,14 +153,14 @@ def prepare_adapter(args: TrainArguments, model, *, template=None, train_dataset
         'lorap_lr_ratio': args.lorap_lr_ratio,
         'init_lora_weights': args.init_weights,
     }
-
+    task_type = 'CAUSAL_LM' if args.num_labels is None else 'SEQ_CLS'
     if args.train_type in ('lora', 'longlora'):
         if args.use_swift_lora:
             lora_config = LoRAConfig(lora_dtype=args.lora_dtype, **lora_kwargs)
             model = Swift.prepare_model(model, lora_config)
             logger.info(f'lora_config: {lora_config}')
         elif args.tuner_backend == 'peft':
-            lora_config = LoraConfig(task_type='CAUSAL_LM', lora_dtype=args.lora_dtype, **lora_kwargs)
+            lora_config = LoraConfig(task_type=task_type, lora_dtype=args.lora_dtype, **lora_kwargs)
             if args.init_weights == 'lora-ga':
                 try:
                     import lora_ga
@@ -211,7 +211,7 @@ def prepare_adapter(args: TrainArguments, model, *, template=None, train_dataset
         lora_kwargs.pop('lorap_lr_ratio', None)
         lora_kwargs['rank_pattern'] = None
         adalora_config = AdaLoraConfig(
-            task_type='CAUSAL_LM',
+            task_type=task_type,
             **lora_kwargs,
             target_r=args.adalora_target_r,
             init_r=args.adalora_init_r,
diff --git a/swift/trainers/mixin.py b/swift/trainers/mixin.py
index 52f55e1aa..fae150efa 100644
--- a/swift/trainers/mixin.py
+++ b/swift/trainers/mixin.py
@@ -5,8 +5,8 @@
 import shutil
 import time
 from contextlib import contextmanager
-from functools import wraps
 from copy import copy
+from functools import wraps
 from types import MethodType
 from typing import Callable, Dict, List, Optional, Tuple, Union
 
@@ -250,20 +250,26 @@ def _save_checkpoint(self, *args, **kwargs):
 
     @contextmanager
     def _patch_loss_function(self):
-        if not hasattr(self.model, 'loss_function'):
+        model = self.model
+        if isinstance(model, PeftModel):
+            model = model.model
+        model_cls = model.__class__
+        if not hasattr(model_cls, 'loss_function'):
             yield
             return
 
-        loss_function = self.model.loss_function
+        loss_function = model.loss_function
+        _old_loss_function = model_cls.loss_function
 
+        @staticmethod
         @wraps(loss_function)
         def new_loss_function(logits, labels, **kwargs):
             labels = labels.to(logits.device)  # fix device_map
             return loss_function(logits=logits, labels=labels, **kwargs)
 
-        self.model.loss_function = new_loss_function
+        model_cls.loss_function = new_loss_function
         yield
-        self.model.loss_function = loss_function
+        model_cls.loss_function = _old_loss_function
 
     def train(self, *args, **kwargs):
         if self.model.model_meta.is_multimodal:
diff --git a/swift/trainers/trainers.py b/swift/trainers/trainers.py
index 1ccc9ce6f..e09090199 100644
--- a/swift/trainers/trainers.py
+++ b/swift/trainers/trainers.py
@@ -128,7 +128,7 @@ def compute_loss(self, model, inputs, return_outputs=None, num_items_in_batch=No
         else:
             unwrapped_model = self.accelerator.unwrap_model(model)
             if is_peft_available() and isinstance(unwrapped_model, PeftModel):
-                model_name = unwrapped_model.base_model.model._get_name()
+                model_name = unwrapped_model.model._get_name()
             else:
                 model_name = unwrapped_model._get_name()
             # User-defined compute_loss function