diff --git a/paddle/fluid/distributed/fleet_executor/CMakeLists.txt b/paddle/fluid/distributed/fleet_executor/CMakeLists.txt
index 8641b36a1be8ea51dc4ad911214c2cebe6121e20..4a2dfcb554ad33439d26517b660cec1e399f93e2 100644
--- a/paddle/fluid/distributed/fleet_executor/CMakeLists.txt
+++ b/paddle/fluid/distributed/fleet_executor/CMakeLists.txt
@@ -13,7 +13,7 @@ endif()
 cc_library(task_loop_thread_pool SRCS task_loop_thread_pool.cc task_loop_thread.cc task_loop.cc DEPS enforce glog)
 
 cc_library(fleet_executor SRCS fleet_executor.cc carrier.cc task_node.cc runtime_graph.cc dist_model.cc interceptor.cc
-        compute_interceptor.cc amplifier_interceptor.cc message_service.cc message_bus.cc dist_model_tensor_wrapper.cc
+        compute_interceptor.cc amplifier_interceptor.cc source_interceptor.cc message_service.cc message_bus.cc dist_model_tensor_wrapper.cc
         DEPS proto_desc fleet_executor_desc_proto interceptor_message_proto task_loop_thread_pool collective_helper
         op_registry executor_gc_helper gflags glog ${BRPC_DEPS})
 
@@ -25,6 +25,7 @@ if(WITH_DISTRIBUTE)
   set_source_files_properties(interceptor.cc PROPERTIES COMPILE_FLAGS ${DISTRIBUTE_COMPILE_FLAGS})
   set_source_files_properties(compute_interceptor.cc PROPERTIES COMPILE_FLAGS ${DISTRIBUTE_COMPILE_FLAGS})
   set_source_files_properties(amplifier_interceptor.cc PROPERTIES COMPILE_FLAGS ${DISTRIBUTE_COMPILE_FLAGS})
+  set_source_files_properties(source_interceptor.cc PROPERTIES COMPILE_FLAGS ${DISTRIBUTE_COMPILE_FLAGS})
   set_source_files_properties(message_bus.h PROPERTIES COMPILE_FLAGS ${DISTRIBUTE_COMPILE_FLAGS})
   set_source_files_properties(message_bus.cc PROPERTIES COMPILE_FLAGS ${DISTRIBUTE_COMPILE_FLAGS})
   set_source_files_properties(fleet_executor.cc PROPERTIES COMPILE_FLAGS ${DISTRIBUTE_COMPILE_FLAGS})
diff --git a/paddle/fluid/distributed/fleet_executor/carrier.cc b/paddle/fluid/distributed/fleet_executor/carrier.cc
index 0d5d328fd32cc2e12d4f4e94c94dae51f0c040bc..358393d97f0710ee6762c86c6a1f56b3ceb1fa2f 100644
--- a/paddle/fluid/distributed/fleet_executor/carrier.cc
+++ b/paddle/fluid/distributed/fleet_executor/carrier.cc
@@ -28,6 +28,7 @@
 namespace paddle {
 namespace distributed {
 
+USE_INTERCEPTOR(Source);
 USE_INTERCEPTOR(Compute);
 USE_INTERCEPTOR(Amplifier);
 
diff --git a/paddle/fluid/distributed/fleet_executor/compute_interceptor.cc b/paddle/fluid/distributed/fleet_executor/compute_interceptor.cc
index d934ab1948e7e584ba1be5e844abc7ad4a6059dc..f49c84e6e5edc0f7e0c97041cd82d196ce0c44bb 100644
--- a/paddle/fluid/distributed/fleet_executor/compute_interceptor.cc
+++ b/paddle/fluid/distributed/fleet_executor/compute_interceptor.cc
@@ -164,7 +164,7 @@ void ComputeInterceptor::ReplyCompletedToUpStream() {
     if (up_id == -1) return;
 
     InterceptorMessage reply_msg;
-    reply_msg.set_message_type(DATE_IS_USELESS);
+    reply_msg.set_message_type(DATA_IS_USELESS);
     Send(up_id, reply_msg);
   }
 }
@@ -247,7 +247,7 @@ void ComputeInterceptor::Compute(const InterceptorMessage& msg) {
   if (msg.message_type() == DATA_IS_READY) {
     IncreaseReady(msg.src_id());
     Run();
-  } else if (msg.message_type() == DATE_IS_USELESS) {
+  } else if (msg.message_type() == DATA_IS_USELESS) {
     DecreaseBuff(msg.src_id());
     Run();
   } else if (msg.message_type() == STOP) {
diff --git a/paddle/fluid/distributed/fleet_executor/interceptor_message.proto b/paddle/fluid/distributed/fleet_executor/interceptor_message.proto
index ed38894641c3a65b7041ea51b736e91d8ecd7a7c..7cf99e8741943774c935e41d8e152c39fffbcd75 100644
--- a/paddle/fluid/distributed/fleet_executor/interceptor_message.proto
+++ b/paddle/fluid/distributed/fleet_executor/interceptor_message.proto
@@ -20,9 +20,10 @@ option cc_enable_arenas = true;
 enum MessageType {
   STOP = 1;            // STOP an Interceptor
   DATA_IS_READY = 2;   // upstream data is ready
-  DATE_IS_USELESS = 3; // downstream has used the data
+  DATA_IS_USELESS = 3; // downstream has used the data
   ERR = 4;             // current Interceptor encounters error
   RESET = 5;           // reset the status
+  START = 6;
 }
 
 message InterceptorMessage {
@@ -30,6 +31,7 @@ message InterceptorMessage {
   optional int64 dst_id = 2 [ default = 0 ];
   optional MessageType message_type = 3 [ default = RESET ];
   optional bool ctrl_message = 4 [ default = false ];
+  optional int64 scope_idx = 5 [ default = 0 ];
 }
 
 message InterceptorResponse { optional bool rst = 1 [ default = false ]; }
diff --git a/paddle/fluid/distributed/fleet_executor/source_interceptor.cc b/paddle/fluid/distributed/fleet_executor/source_interceptor.cc
new file mode 100644
index 0000000000000000000000000000000000000000..78b2bed66dd99d60d1e39782e501d116bd6c1ec7
--- /dev/null
+++ b/paddle/fluid/distributed/fleet_executor/source_interceptor.cc
@@ -0,0 +1,57 @@
+// Copyright (c) 2022 PaddlePaddle Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// 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.
+
+#include "paddle/fluid/distributed/fleet_executor/source_interceptor.h"
+#include "paddle/fluid/distributed/fleet_executor/task_node.h"
+
+namespace paddle {
+namespace distributed {
+
+SourceInterceptor::SourceInterceptor(int64_t interceptor_id, TaskNode* node)
+    : Interceptor(interceptor_id, node), max_run_times_(node->max_run_times()) {
+  // prepare the downstream running status
+  for (const auto& down : node->downstream()) {
+    downstream_step_.emplace(down.first, 0);
+  }
+  RegisterMsgHandle([this](const InterceptorMessage& msg) { Run(msg); });
+}
+
+void SourceInterceptor::SendDataReadyToDownStream(int64_t downstream_id) {
+  int64_t micro_step = downstream_step_.at(downstream_id);
+  if (micro_step >= max_run_times_) {
+    return;
+  }
+  int64_t scope_idx = micro_step % max_run_times_;
+  InterceptorMessage ready_msg;
+  ready_msg.set_message_type(DATA_IS_READY);
+  ready_msg.set_scope_idx(scope_idx);
+  Send(downstream_id, ready_msg);
+  downstream_step_.at(downstream_id) = micro_step + 1;
+}
+
+void SourceInterceptor::Run(const InterceptorMessage& msg) {
+  if (msg.message_type() == START) {
+    // start run in a new step, reset the previous running status
+    for (const auto& down : downstream_step_) {
+      downstream_step_.at(down.first) = 0;
+      SendDataReadyToDownStream(down.first);
+    }
+  } else if (msg.message_type() == DATA_IS_USELESS) {
+    SendDataReadyToDownStream(msg.src_id());
+  }
+}
+
+REGISTER_INTERCEPTOR(Source, SourceInterceptor);
+}  // namespace distributed
+}  // namespace paddle
diff --git a/paddle/fluid/distributed/fleet_executor/source_interceptor.h b/paddle/fluid/distributed/fleet_executor/source_interceptor.h
new file mode 100644
index 0000000000000000000000000000000000000000..f8b18fb1848645c44c75db90a7d123ba48aeae21
--- /dev/null
+++ b/paddle/fluid/distributed/fleet_executor/source_interceptor.h
@@ -0,0 +1,41 @@
+// Copyright (c) 2022 PaddlePaddle Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// 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.
+
+#pragma once
+#include "paddle/fluid/distributed/fleet_executor/interceptor.h"
+
+namespace paddle {
+namespace distributed {
+
+/*
+ * Source interceptor
+ * There is only one source in the runtime graph
+ * Take charge of:
+ *   1. receive `start` message from carrier
+ *   2. send num_of_steps `data_is_ready` message to downstream
+ */
+class SourceInterceptor : public Interceptor {
+ public:
+  SourceInterceptor(int64_t interceptor_id, TaskNode* node);
+
+ private:
+  void SendDataReadyToDownStream(int64_t down_id);
+  void Run(const InterceptorMessage& msg);
+  int64_t max_run_times_;
+  // downstream_id->cur_step
+  std::map<int64_t, int64_t> downstream_step_;
+};
+
+}  // namespace distributed
+}  // namespace paddle
diff --git a/paddle/fluid/distributed/fleet_executor/test/CMakeLists.txt b/paddle/fluid/distributed/fleet_executor/test/CMakeLists.txt
index d4587b90c87f3deadba686230728ed084b2a18ad..33c08acd4498df9d422ec518cc458194501b72d1 100644
--- a/paddle/fluid/distributed/fleet_executor/test/CMakeLists.txt
+++ b/paddle/fluid/distributed/fleet_executor/test/CMakeLists.txt
@@ -4,6 +4,9 @@ cc_test(interceptor_ping_pong_test SRCS interceptor_ping_pong_test.cc DEPS fleet
 set_source_files_properties(compute_interceptor_test.cc PROPERTIES COMPILE_FLAGS ${DISTRIBUTE_COMPILE_FLAGS})
 cc_test(compute_interceptor_test SRCS compute_interceptor_test.cc DEPS fleet_executor ${BRPC_DEPS})
 
+set_source_files_properties(source_interceptor_test.cc PROPERTIES COMPILE_FLAGS ${DISTRIBUTE_COMPILE_FLAGS})
+cc_test(source_interceptor_test SRCS source_interceptor_test.cc DEPS fleet_executor ${BRPC_DEPS})
+
 set_source_files_properties(interceptor_pipeline_short_path_test.cc PROPERTIES COMPILE_FLAGS ${DISTRIBUTE_COMPILE_FLAGS})
 cc_test(interceptor_pipeline_short_path_test SRCS interceptor_pipeline_short_path_test.cc DEPS fleet_executor ${BRPC_DEPS})
 
diff --git a/paddle/fluid/distributed/fleet_executor/test/source_interceptor_test.cc b/paddle/fluid/distributed/fleet_executor/test/source_interceptor_test.cc
new file mode 100644
index 0000000000000000000000000000000000000000..cf49e97474af0373497dc04c3d254dae820b2caf
--- /dev/null
+++ b/paddle/fluid/distributed/fleet_executor/test/source_interceptor_test.cc
@@ -0,0 +1,84 @@
+// Copyright (c) 2022 PaddlePaddle Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// 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.
+
+#include <iostream>
+#include <unordered_map>
+
+#include "gtest/gtest.h"
+
+#include "paddle/fluid/distributed/fleet_executor/carrier.h"
+#include "paddle/fluid/distributed/fleet_executor/global.h"
+#include "paddle/fluid/distributed/fleet_executor/interceptor.h"
+#include "paddle/fluid/distributed/fleet_executor/message_bus.h"
+#include "paddle/fluid/distributed/fleet_executor/task_node.h"
+
+namespace paddle {
+namespace distributed {
+
+class FakeInterceptor : public Interceptor {
+ public:
+  FakeInterceptor(int64_t interceptor_id, TaskNode* node)
+      : Interceptor(interceptor_id, node) {
+    step_ = 0;
+    RegisterMsgHandle([this](const InterceptorMessage& msg) { NOP(msg); });
+  }
+
+  void NOP(const InterceptorMessage& msg) {
+    if (msg.message_type() == DATA_IS_READY) {
+      std::cout << "FakeInterceptor run in scope " << msg.scope_idx()
+                << std::endl;
+      InterceptorMessage reply;
+      reply.set_message_type(DATA_IS_USELESS);
+      Send(-1, reply);
+      step_++;
+      if (step_ == node_->max_run_times()) {
+        carrier_->WakeUp();
+      }
+    }
+  }
+
+ private:
+  int64_t step_;
+};
+
+TEST(SourceInterceptor, Source) {
+  std::string carrier_id = "0";
+  Carrier* carrier =
+      GlobalMap<std::string, Carrier>::Create(carrier_id, carrier_id);
+  carrier->Init(0, {{-1, 0}, {0, 0}});
+
+  MessageBus* msg_bus = GlobalVal<MessageBus>::Create();
+  msg_bus->Init(0, {{0, "127.0.0.0:0"}}, "");
+
+  // NOTE: don't delete, otherwise interceptor will use undefined node
+  TaskNode* source = new TaskNode(0, -1, 0, 3, 0);  // role, rank, task_id
+  TaskNode* node_a = new TaskNode(0, 0, 0, 3, 0);   // role, rank, task_id
+
+  source->AddDownstreamTask(0, 1);
+  node_a->AddUpstreamTask(-1, 1);
+  carrier->SetInterceptor(-1, InterceptorFactory::Create("Source", -1, source));
+  carrier->SetInterceptor(0, std::make_unique<FakeInterceptor>(0, node_a));
+
+  // start
+  InterceptorMessage msg;
+  msg.set_message_type(START);
+  msg.set_dst_id(-1);
+  carrier->EnqueueInterceptorMessage(msg);
+
+  carrier->Wait();
+  carrier->Release();
+}
+
+}  // namespace distributed
+}  // namespace paddle