diff --git a/test_tipc/test_train_inference_python.sh b/test_tipc/test_train_inference_python.sh
index b69c0f278f2886eeb7c01847bab5d54ff7a18af6..b9bf9edf309c02fde0a679891b709deef6da9465 100644
--- a/test_tipc/test_train_inference_python.sh
+++ b/test_tipc/test_train_inference_python.sh
@@ -259,7 +259,6 @@ else
             env=""
         elif [ ${#gpu} -le 1 ];then
             env="export CUDA_VISIBLE_DEVICES=${gpu}"
-            eval ${env}
         elif [ ${#gpu} -le 15 ];then
             IFS=","
             array=(${gpu})
@@ -280,6 +279,7 @@ else
                 set_amp_config=" "
             fi          
             for trainer in ${trainer_list[*]}; do 
+                eval ${env}
                 flag_quant=False
                 if [ ${trainer} = ${pact_key} ]; then
                     run_train=${pact_trainer}
@@ -332,7 +332,6 @@ else
                     cmd="${python} -m paddle.distributed.launch --ips=${ips} --gpus=${gpu} ${run_train} ${set_use_gpu} ${set_save_model} ${set_pretrain} ${set_epoch} ${set_autocast} ${set_batchsize} ${set_train_params1} ${set_amp_config}"
                 fi
                 # run train
-                eval "unset CUDA_VISIBLE_DEVICES"
                 eval $cmd
                 status_check $? "${cmd}" "${status_log}"