diff --git a/paddle/fluid/operators/pool_op.cc b/paddle/fluid/operators/pool_op.cc
index 7e1df3b9efec64c3189d2cd80e761994cc061b45..4f6f779c1d77003e8e61ee8e3125dab12ca821c9 100644
--- a/paddle/fluid/operators/pool_op.cc
+++ b/paddle/fluid/operators/pool_op.cc
@@ -204,7 +204,7 @@ void Pool2dOpMaker::Make() {
       .SetDefault(false);
   AddAttr<bool>(
       "ceil_mode",
-      "(bool, default false) Wether to use the ceil function to calculate "
+      "(bool, default false) Whether to use the ceil function to calculate "
       "output height and width. False is the default. If it is set to False, "
       "the floor function will be used.")
       .SetDefault(false);
@@ -333,7 +333,7 @@ void Pool3dOpMaker::Make() {
   AddAttr<bool>(
       "global_pooling",
       "(bool, default false) Whether to use the global pooling. "
-      "If global_pooling = true, ksize and paddings wille be ignored.")
+      "If global_pooling = true, ksize and paddings will be ignored.")
       .SetDefault(false);
   AddAttr<std::vector<int>>(
       "strides",
@@ -368,7 +368,7 @@ void Pool3dOpMaker::Make() {
       .SetDefault(false);
   AddAttr<bool>(
       "ceil_mode",
-      "(bool, default false) Wether to use the ceil function to calculate "
+      "(bool, default false) Whether to use the ceil function to calculate "
       "output height and width. False is the default. If it is set to False, "
       "the floor function will be used.")
       .SetDefault(false);
diff --git a/python/paddle/fluid/layers/nn.py b/python/paddle/fluid/layers/nn.py
index 1f971df9348c8e653a9e47c1653e66bbcc03ff1d..cf3564b41eff8b29e9c402a9d3f5fd6bc8f99a28 100644
--- a/python/paddle/fluid/layers/nn.py
+++ b/python/paddle/fluid/layers/nn.py
@@ -2542,8 +2542,11 @@ def pool3d(input,
                           the number of channels, D is the depth of the feature,
                           H is the height of the feature, and W is the width
                           of the feature.
-        pool_size (int): ${ksize_comment}
-        pool_type (str): ${pooling_type_comment}
+        pool_size (int|list|tuple): The pool kernel size. If pool kernel size 
+            is a tuple or list, it must contain three integers, 
+            (pool_size_Depth, pool_size_Height, pool_size_Width).
+            Otherwise, the pool kernel size will be the cube of an int.
+        pool_type (string): ${pooling_type_comment}
         pool_stride (int): stride of the pooling layer.
         pool_padding (int): padding size.
         global_pooling (bool): ${global_pooling_comment}