diff --git a/paddlespeech/s2t/decoders/__init__.py b/paddlespeech/s2t/decoders/__init__.py
index f04a6d19..8878a76f 100644
--- a/paddlespeech/s2t/decoders/__init__.py
+++ b/paddlespeech/s2t/decoders/__init__.py
@@ -11,4 +11,21 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-from .ctcdecoder import swig_wrapper
+
+from paddlespeech.s2t.utils.log import Log
+logger = Log(__name__).getlog()
+
+try:
+    from .ctcdecoder import swig_wrapper
+except:
+    try:
+        import pip
+        if int(pip.__version__.split('.')[0])>9:
+            from pip._internal import main
+        else:
+            from pip import main
+        package_name = 'paddlespeech_ctcdecoders'
+        main(['install', package_name])
+    except Exception as e:
+        logger.info("paddlespeech_ctcdecoders not installed!")
+
diff --git a/paddlespeech/s2t/models/ds2/__init__.py b/paddlespeech/s2t/models/ds2/__init__.py
index 39bea5bf..094fe928 100644
--- a/paddlespeech/s2t/models/ds2/__init__.py
+++ b/paddlespeech/s2t/models/ds2/__init__.py
@@ -14,4 +14,19 @@
 from .deepspeech2 import DeepSpeech2InferModel
 from .deepspeech2 import DeepSpeech2Model
 
+try:
+    import swig_decoders
+except:
+    try:
+        import pip
+        if int(pip.__version__.split('.')[0])>9:
+            from pip._internal import main
+        else:
+            from pip import main
+        package_name = 'paddlespeech_ctcdecoders'
+        main(['install', package_name])
+    except:
+        raise RuntimeError("Can not install package paddlespeech_ctcdecoders on your system. \
+                The DeepSpeech2 model is not supported for your system")
+
 __all__ = ['DeepSpeech2Model', 'DeepSpeech2InferModel']
diff --git a/paddlespeech/s2t/models/ds2_online/__init__.py b/paddlespeech/s2t/models/ds2_online/__init__.py
index 255000ee..c8f2f55c 100644
--- a/paddlespeech/s2t/models/ds2_online/__init__.py
+++ b/paddlespeech/s2t/models/ds2_online/__init__.py
@@ -14,4 +14,20 @@
 from .deepspeech2 import DeepSpeech2InferModelOnline
 from .deepspeech2 import DeepSpeech2ModelOnline
 
+try:
+    import swig_decoders
+except:
+    try:
+        import pip
+        if int(pip.__version__.split('.')[0])>9:
+            from pip._internal import main
+        else:
+            from pip import main
+        package_name = 'paddlespeech_ctcdecoders'
+        main(['install', package_name])
+    except:
+        raise RuntimeError("Can not install package paddlespeech_ctcdecoders on your system. \
+                The DeepSpeech2 model is not supported for your system")
+
+
 __all__ = ['DeepSpeech2ModelOnline', 'DeepSpeech2InferModelOnline']
diff --git a/paddlespeech/s2t/modules/ctc.py b/paddlespeech/s2t/modules/ctc.py
index 120abd2b..2d368dae 100644
--- a/paddlespeech/s2t/modules/ctc.py
+++ b/paddlespeech/s2t/modules/ctc.py
@@ -28,8 +28,21 @@ try:
     from paddlespeech.s2t.decoders.ctcdecoder.swig_wrapper import ctc_beam_search_decoder_batch  # noqa: F401
     from paddlespeech.s2t.decoders.ctcdecoder.swig_wrapper import ctc_greedy_decoder  # noqa: F401
     from paddlespeech.s2t.decoders.ctcdecoder.swig_wrapper import Scorer  # noqa: F401
-except Exception as e:
-    logger.info("ctcdecoder not installed!")
+except:
+    try:
+        import pip
+        if int(pip.__version__.split('.')[0])>9:
+            from pip._internal import main
+        else:
+            from pip import main
+        package_name = 'paddlespeech_ctcdecoders'
+        main(['install', package_name])
+    except Exception as e:
+        logger.info("paddlespeech_ctcdecoders not installed!")
+
+#try:
+#except Exception as e:
+#    logger.info("ctcdecoder not installed!")
 
 __all__ = ['CTCDecoder']
 
@@ -51,7 +64,7 @@ class CTCDecoderBase(nn.Layer):
             dropout_rate (float): dropout rate (0.0 ~ 1.0)
             reduction (bool): reduce the CTC loss into a scalar, True for 'sum' or 'none'
             batch_average (bool): do batch dim wise average.
-            grad_norm_type (str): Default, None. one of 'instance', 'batch', 'frame', None. 
+            grad_norm_type (str): Default, None. one of 'instance', 'batch', 'frame', None.
         """
         assert check_argument_types()
         super().__init__()
diff --git a/setup.py b/setup.py
index 7720ba3f..0816cc78 100644
--- a/setup.py
+++ b/setup.py
@@ -44,7 +44,6 @@ requirements = {
         "nltk",
         "pandas",
         "paddleaudio",
-        "paddlespeech_ctcdecoders",
         "paddlespeech_feat",
         "praatio~=4.1",
         "pypi-kenlm",
@@ -70,6 +69,7 @@ requirements = {
         "ConfigArgParse",
         "coverage",
         "gpustat",
+        "paddlespeech_ctcdecoders",
         "phkit",
         "Pillow",
         "pybind11",