diff --git a/paddle/fluid/API.spec b/paddle/fluid/API.spec
index c40f6033419a2425d9996eb9a4584fc9cd1a70e3..092008aa86cc1fcb9e08302591026a553a231845 100644
--- a/paddle/fluid/API.spec
+++ b/paddle/fluid/API.spec
@@ -411,3 +411,20 @@ paddle.fluid.Scope.drop_kids drop_kids(self: paddle.fluid.core.Scope) -> None
 paddle.fluid.Scope.find_var find_var(self: paddle.fluid.core.Scope, arg0: unicode) -> paddle.fluid.core.Variable
 paddle.fluid.Scope.new_scope new_scope(self: paddle.fluid.core.Scope) -> paddle.fluid.core.Scope
 paddle.fluid.Scope.var var(self: paddle.fluid.core.Scope, arg0: unicode) -> paddle.fluid.core.Variable
+paddle.reader.map_readers ArgSpec(args=['func'], varargs='readers', keywords=None, defaults=None)
+paddle.reader.buffered ArgSpec(args=['reader', 'size'], varargs=None, keywords=None, defaults=None)
+paddle.reader.compose ArgSpec(args=[], varargs='readers', keywords='kwargs', defaults=None)
+paddle.reader.chain ArgSpec(args=[], varargs='readers', keywords=None, defaults=None)
+paddle.reader.shuffle ArgSpec(args=['reader', 'buf_size'], varargs=None, keywords=None, defaults=None)
+paddle.reader.ComposeNotAligned.__init__ 
+paddle.reader.ComposeNotAligned.args.__init__ 
+paddle.reader.ComposeNotAligned.message.__init__ 
+paddle.reader.firstn ArgSpec(args=['reader', 'n'], varargs=None, keywords=None, defaults=None)
+paddle.reader.xmap_readers ArgSpec(args=['mapper', 'reader', 'process_num', 'buffer_size', 'order'], varargs=None, keywords=None, defaults=(False,))
+paddle.reader.PipeReader.__init__ ArgSpec(args=['self', 'command', 'bufsize', 'file_type'], varargs=None, keywords=None, defaults=(8192, 'plain'))
+paddle.reader.PipeReader.get_line ArgSpec(args=['self', 'cut_lines', 'line_break'], varargs=None, keywords=None, defaults=(True, '\n'))
+paddle.reader.multiprocess_reader ArgSpec(args=['readers', 'use_pipe', 'queue_size'], varargs=None, keywords=None, defaults=(True, 1000))
+paddle.reader.Fake.__init__ ArgSpec(args=['self'], varargs=None, keywords=None, defaults=None)
+paddle.reader.creator.np_array ArgSpec(args=['x'], varargs=None, keywords=None, defaults=None)
+paddle.reader.creator.text_file ArgSpec(args=['path'], varargs=None, keywords=None, defaults=None)
+paddle.reader.creator.recordio ArgSpec(args=['paths', 'buf_size'], varargs=None, keywords=None, defaults=(100,))
diff --git a/paddle/scripts/paddle_build.sh b/paddle/scripts/paddle_build.sh
index a6720fa798ec5cf60a8806a7f72fe6febaf4f7ac..63707245e5ee4cdf31ef0cc58fcb6a06cf0544a1 100755
--- a/paddle/scripts/paddle_build.sh
+++ b/paddle/scripts/paddle_build.sh
@@ -454,7 +454,7 @@ function assert_api_not_changed() {
     virtualenv .env
     source .env/bin/activate
     pip install ${PADDLE_ROOT}/build/python/dist/*whl
-    python ${PADDLE_ROOT}/tools/print_signatures.py paddle.fluid > new.spec
+    python ${PADDLE_ROOT}/tools/print_signatures.py paddle.fluid,paddle.reader > new.spec
     if [ "$1" == "cp35-cp35m" ] || [ "$1" == "cp36-cp36m" ] || [ "$1" == "cp37-cp37m" ]; then
         # Use sed to make python2 and python3 sepc keeps the same
         sed -i 's/arg0: str/arg0: unicode/g' new.spec
diff --git a/tools/print_signatures.py b/tools/print_signatures.py
index e2805c4e7e6aa26a5865b64a874feef672bf9b36..83f6434dfda199ee0a65db7cfb50405dad2c5b3d 100644
--- a/tools/print_signatures.py
+++ b/tools/print_signatures.py
@@ -15,7 +15,7 @@
 Print all signature of a python module in alphabet order.
 
 Usage:
-    ./print_signature  "paddle.fluid" > signature.txt
+    ./print_signature  "paddle.fluid,paddle.reader" > signature.txt
 """
 from __future__ import print_function
 
@@ -30,7 +30,7 @@ member_dict = collections.OrderedDict()
 
 def visit_member(parent_name, member):
     cur_name = ".".join([parent_name, member.__name__])
-    if inspect.isclass(member):
+    if inspect.isclass(member) or inspect.isgetsetdescriptor(member):
         for name, value in inspect.getmembers(member):
             if hasattr(value, '__name__') and (not name.startswith("_") or
                                                name == "__init__"):
@@ -63,7 +63,9 @@ def visit_all_module(mod):
             visit_member(mod.__name__, instance)
 
 
-visit_all_module(importlib.import_module(sys.argv[1]))
+modules = sys.argv[1].split(",")
+for m in modules:
+    visit_all_module(importlib.import_module(m))
 
 for name in member_dict:
     print(name, member_dict[name])