diff --git a/ppdet/engine/trainer.py b/ppdet/engine/trainer.py
index abab5372b2dcc0458531e373e14254627bc90a70..73012668658181dd54af3808271ff46a20fb444f 100644
--- a/ppdet/engine/trainer.py
+++ b/ppdet/engine/trainer.py
@@ -421,8 +421,10 @@ class Trainer(object):
         model = self.model
         if self.cfg.get('to_static', False):
             model = apply_to_static(self.cfg, model)
-        sync_bn = (getattr(self.cfg, 'norm_type', None) == 'sync_bn' and
-                   (self.cfg.use_gpu or self.cfg.use_mlu) and self._nranks > 1)
+        sync_bn = (
+            getattr(self.cfg, 'norm_type', None) == 'sync_bn' and
+            (self.cfg.use_gpu or self.cfg.use_npu or self.cfg.use_mlu) and
+            self._nranks > 1)
         if sync_bn:
             model = paddle.nn.SyncBatchNorm.convert_sync_batchnorm(model)
 
@@ -484,7 +486,8 @@ class Trainer(object):
                             DataParallel) and use_fused_allreduce_gradients:
                         with model.no_sync():
                             with paddle.amp.auto_cast(
-                                    enable=self.cfg.use_gpu or self.cfg.use_mlu,
+                                    enable=self.cfg.use_gpu or
+                                    self.cfg.use_npu or self.cfg.use_mlu,
                                     custom_white_list=self.custom_white_list,
                                     custom_black_list=self.custom_black_list,
                                     level=self.amp_level):
@@ -498,7 +501,8 @@ class Trainer(object):
                             list(model.parameters()), None)
                     else:
                         with paddle.amp.auto_cast(
-                                enable=self.cfg.use_gpu or self.cfg.use_mlu,
+                                enable=self.cfg.use_gpu or self.cfg.use_npu or
+                                self.cfg.use_mlu,
                                 custom_white_list=self.custom_white_list,
                                 custom_black_list=self.custom_black_list,
                                 level=self.amp_level):
@@ -612,7 +616,8 @@ class Trainer(object):
             # forward
             if self.use_amp:
                 with paddle.amp.auto_cast(
-                        enable=self.cfg.use_gpu or self.cfg.use_mlu,
+                        enable=self.cfg.use_gpu or self.cfg.use_npu or
+                        self.cfg.use_mlu,
                         custom_white_list=self.custom_white_list,
                         custom_black_list=self.custom_black_list,
                         level=self.amp_level):
@@ -679,7 +684,8 @@ class Trainer(object):
             # forward
             if self.use_amp:
                 with paddle.amp.auto_cast(
-                        enable=self.cfg.use_gpu or self.cfg.use_mlu,
+                        enable=self.cfg.use_gpu or self.cfg.use_npu or
+                        self.cfg.use_mlu,
                         custom_white_list=self.custom_white_list,
                         custom_black_list=self.custom_black_list,
                         level=self.amp_level):
diff --git a/ppdet/utils/check.py b/ppdet/utils/check.py
index 5235e0ebe79a2097b8f059b071e28e680955e823..7690ade9eab0a7d859459a0be74d344446be6938 100644
--- a/ppdet/utils/check.py
+++ b/ppdet/utils/check.py
@@ -53,16 +53,17 @@ def check_mlu(use_mlu):
 def check_npu(use_npu):
     """
     Log error and exit when set use_npu=true in paddlepaddle
-    cpu/gpu/xpu version.
+    version without paddle-custom-npu installed.
     """
     err = "Config use_npu cannot be set as true while you are " \
-          "using paddlepaddle cpu/gpu/xpu version ! \nPlease try: \n" \
-          "\t1. Install paddlepaddle-npu to run model on NPU \n" \
+          "using paddlepaddle version without paddle-custom-npu " \
+          "installed! \nPlease try: \n" \
+          "\t1. Install paddle-custom-npu to run model on NPU \n" \
           "\t2. Set use_npu as false in config file to run " \
-          "model on CPU/GPU/XPU"
+          "model on other devices supported."
 
     try:
-        if use_npu and not paddle.is_compiled_with_npu():
+        if use_npu and not 'npu' in paddle.device.get_all_custom_device_type():
             logger.error(err)
             sys.exit(1)
     except Exception as e: