diff --git a/otx/cli/utils/multi_gpu.py b/otx/cli/utils/multi_gpu.py
index 651a7be09cd..50ccb9bc8cd 100644
--- a/otx/cli/utils/multi_gpu.py
+++ b/otx/cli/utils/multi_gpu.py
@@ -169,7 +169,6 @@ def run_child_process(train_func: Callable, rank: int, gpu_ids: List[int], outpu
             output_path (str): output path where task output are saved.
             multi_gpu_port (str): port for communication between multi GPU processes.
         """
-        mp.set_start_method(method="fork", force=True)  # set multi porcess method as fork
         gpus_arg_idx = sys.argv.index("--gpus")
         for _ in range(2):
             sys.argv.pop(gpus_arg_idx)