diff --git a/train.py b/train.py
index cf777b1..6249b91 100644
--- a/train.py
+++ b/train.py
@@ -3,7 +3,7 @@ import argparse
 import torch
 
 from torch.optim import AdamW
-from khaosz.core import ParameterLoader
+from khaosz.core import ParameterLoader, Checkpoint
 from khaosz.trainer import Trainer, DatasetLoader, TrainConfig, CosineScheduleConfig
 from khaosz.trainer import StrategyFactory
 
@@ -35,11 +35,17 @@ def train(
     embdeding_lr_rate: int,
     random_seed: int,
     multi_turn: bool,
+    resume_from_checkpoint: bool
 ):
     assert train_type in ["seq", "sft", "dpo"]
     assert os.path.exists(param_path)
     
     parameter = ParameterLoader.load(param_path)
+    checkpoint = None
+    
+    if isinstance(parameter, Checkpoint) and resume_from_checkpoint:
+        checkpoint = parameter
+        
     model = parameter.model
     
     device = torch.device("cuda")
@@ -92,6 +98,8 @@ def train(
         accumulation_steps=accumulation_steps,
         max_grad_norm=max_grad_norm,
         random_seed=random_seed,
+        num_workers=4,
+        pin_memory=True
     )
     
     schedule_config = CosineScheduleConfig(
@@ -104,7 +112,7 @@ def train(
         train_config=train_config,
         schedule_config=schedule_config,
     )
-    trainer.train()
+    trainer.train(checkpoint)
     
 
 if __name__ == "__main__":
@@ -127,27 +135,10 @@ if __name__ == "__main__":
     parser.add_argument("--random_seed", type=int, default=3407, help="Random seed for reproducibility.")
     
     # other configs
+    parser.add_argument("--resume_from_checkpoint", type=bool, default=False, help="train from checkpoint or not.")
     parser.add_argument("--multi_turn", type=bool, default=False, help="Whether to use multi-turn convsersation training.")
     parser.add_argument("--dpo_beta", type=float, default=0.1, help="DPO beta value.")
     
     args = parser.parse_args()
 
-    train(
-        param_path=args.param_path,
-        data_root_path=args.data_root_path,
-        n_epoch=args.n_epoch,
-        batch_size=args.batch_size,
-        accumulation_steps=args.accumulation_steps,
-        warmup_steps=args.warmup_steps,
-        max_lr=args.max_lr,
-        dpo_beta=args.dpo_beta,
-        adamw_betas=args.adamw_betas,
-        adamw_weight_decay=args.adamw_weight_decay,
-        max_grad_norm=args.max_grad_norm,
-        embdeding_lr_rate=args.embdeding_lr_rate,
-        checkpoint_interval=args.checkpoint_interval,
-        checkpoint_dir=args.checkpoint_dir,
-        train_type=args.train_type,
-        random_seed=args.random_seed,
-        multi_turn=args.multi_turn
-    )
\ No newline at end of file
+    train(**vars(args))
\ No newline at end of file