diff --git a/paddle/pybind/protobuf.cc b/paddle/pybind/protobuf.cc
index 47b3c43ebfccd0d26ac5a44d10911018895ba353..bfbe177e8f2a95c8835d32077d43819ef1ad00c5 100644
--- a/paddle/pybind/protobuf.cc
+++ b/paddle/pybind/protobuf.cc
@@ -15,9 +15,10 @@ limitations under the License. */
 #include "paddle/pybind/protobuf.h"
 
 namespace paddle {
-namespace framework {
+namespace pybind {
 
 void BindProgramDesc(py::module &m) {
+  using namespace paddle::framework;  // NOLINT
   py::class_<ProgramDesc>(m, "ProgramDesc", "")
       .def_static("instance",
                   [] { return &GetProgramDesc(); },
@@ -42,10 +43,14 @@ void BindProgramDesc(py::module &m) {
       .def("root_block",
            [](ProgramDesc &self) { return self.mutable_blocks()->Mutable(0); },
            py::return_value_policy::reference)
+      .def("block",
+           [](ProgramDesc &self, int id) { return self.blocks(id); },
+           py::return_value_policy::reference)
       .def("__str__", [](ProgramDesc &self) { return self.DebugString(); });
 }
 
 void BindBlockDesc(py::module &m) {
+  using namespace paddle::framework;  // NOLINT
   py::class_<BlockDesc>(m, "BlockDesc", "")
       .def("id", [](BlockDesc &self) { return self.idx(); })
       .def("parent", [](BlockDesc &self) { return self.parent_idx(); })
@@ -58,6 +63,7 @@ void BindBlockDesc(py::module &m) {
 }
 
 void BindVarDsec(py::module &m) {
+  using namespace paddle::framework;  // NOLINT
   py::class_<VarDesc>(m, "VarDesc", "")
       .def(py::init<>())
       .def("set_name",
@@ -86,6 +92,7 @@ void BindVarDsec(py::module &m) {
 }
 
 void BindOpDesc(py::module &m) {
+  using namespace paddle::framework;  // NOLINT
   auto op_desc_set_var = [](OpDesc::Var *var,
                             const std::string &parameter,
                             const std::vector<std::string> &arguments) {
@@ -132,5 +139,5 @@ void BindOpDesc(py::module &m) {
              op_desc_set_attr(self, name)->set_i(i);
            });
 }
-}  // namespace framework
+}  // namespace pybind
 }  // namespace paddle
diff --git a/paddle/pybind/protobuf.h b/paddle/pybind/protobuf.h
index a32acfb03826e8cf0161f3a001e05d6b5a76ac2b..de9a008e25d1e7b076eabea4f83fc71dfca881da 100644
--- a/paddle/pybind/protobuf.h
+++ b/paddle/pybind/protobuf.h
@@ -25,7 +25,7 @@ limitations under the License. */
 namespace py = pybind11;
 
 namespace paddle {
-namespace framework {
+namespace pybind {
 
 template <typename T>
 inline std::vector<T> RepeatedToVector(
@@ -50,5 +50,5 @@ void BindProgramDesc(py::module& m);
 void BindBlockDesc(py::module& m);
 void BindVarDsec(py::module& m);
 void BindOpDesc(py::module& m);
-}  // namespace framework
+}  // namespace pybind
 }  // namespace paddle
diff --git a/python/paddle/v2/framework/tests/test_protobuf_descs.py b/python/paddle/v2/framework/tests/test_protobuf_descs.py
index 71bdca8765353416cc7450251a9cb9a0d74fdb26..d0192814ef2396aac6767e945e87a6d6e3953a8e 100644
--- a/python/paddle/v2/framework/tests/test_protobuf_descs.py
+++ b/python/paddle/v2/framework/tests/test_protobuf_descs.py
@@ -23,6 +23,7 @@ class TestProgramDesc(unittest.TestCase):
         self.assertEqual(block_root.id(), block1.parent())
         block3 = prog_desc.append_block(block_root)
         self.assertEqual(block3.parent(), block_root.id())
+        self.assertEqual(prog_desc.block(1).id(), 1)
 
 
 class TestVarDesc(unittest.TestCase):