diff --git a/parakeet/utils/layer_tools.py b/parakeet/utils/layer_tools.py
new file mode 100644
index 0000000..eaa9c9e
--- /dev/null
+++ b/parakeet/utils/layer_tools.py
@@ -0,0 +1,35 @@
+import numpy as np
+from torch import nn
+import paddle.fluid.dygraph as dg
+
+
+def summary(layer):
+    num_params = num_elements = 0
+    print("layer summary:")
+    for name, param in layer.state_dict().items():
+        print("{}|{}|{}".format(name, param.shape, np.prod(param.shape)))
+        num_elements += np.prod(param.shape)
+        num_params += 1
+    print("layer has {} parameters, {} elements.".format(
+        num_params, num_elements))
+
+
+def freeze(layer):
+    for param in layer.parameters():
+        param.trainable = False
+
+
+def unfreeze(layer):
+    for param in layer.parameters():
+        param.trainable = True
+
+
+def torch_summary(layer):
+    num_params = num_elements = 0
+    print("layer summary:")
+    for name, param in layer.named_parameters():
+        print("{}|{}|{}".format(name, param.shape, np.prod(param.shape)))
+        num_elements += np.prod(param.shape)
+        num_params += 1
+    print("layer has {} parameters, {} elements.".format(
+        num_params, num_elements))