diff --git a/paddle/fluid/distributed/fleet_executor/amplifier_interceptor.cc b/paddle/fluid/distributed/fleet_executor/amplifier_interceptor.cc
index 72c689732b5b7df5f61d28d93a3bef6e305f426d..a166ff0b6dfa2f381da02ff0e90dadc08732de5e 100644
--- a/paddle/fluid/distributed/fleet_executor/amplifier_interceptor.cc
+++ b/paddle/fluid/distributed/fleet_executor/amplifier_interceptor.cc
@@ -33,7 +33,7 @@ void AmplifierInterceptor::RunOps() {
   // run_per_steps_, run_at_offset_
   // 4, 0 --> run at step 0, 4, 8, 12
   // 4, 3 --> run at step 3, 7, 11, 15
-  if ((step_ % run_per_steps_) == run_at_offset_) {
+  if ((cur_scope_id_ % run_per_steps_) == run_at_offset_) {
     ComputeInterceptor::RunOps();
   }
 }
@@ -41,7 +41,7 @@ void AmplifierInterceptor::RunOps() {
 void AmplifierInterceptor::SendDataReadyToDownStream() {
   // run multi times, send ready one times to downstream, that is
   // input multi times, output one times
-  if (step_ % send_down_per_steps_ == 0) {
+  if (cur_scope_id_ % send_down_per_steps_ == 0) {
     ComputeInterceptor::SendDataReadyToDownStream();
   }
 }
@@ -49,7 +49,7 @@ void AmplifierInterceptor::SendDataReadyToDownStream() {
 void AmplifierInterceptor::ReplyCompletedToUpStream() {
   // run multi times, reply one times to upstream, that is
   // input one times, output multi times
-  if (step_ % reply_up_per_steps_ == 0) {
+  if (cur_scope_id_ % reply_up_per_steps_ == 0) {
     ComputeInterceptor::ReplyCompletedToUpStream();
   }
 }
diff --git a/paddle/fluid/distributed/fleet_executor/amplifier_interceptor.h b/paddle/fluid/distributed/fleet_executor/amplifier_interceptor.h
index 776aa8d3e88db10d551d6fd0180a5da9d6a6f3db..93e8ffa1d75aecc063b05fff84545238e7a1fba2 100644
--- a/paddle/fluid/distributed/fleet_executor/amplifier_interceptor.h
+++ b/paddle/fluid/distributed/fleet_executor/amplifier_interceptor.h
@@ -21,7 +21,7 @@
 namespace paddle {
 namespace distributed {
 
-class AmplifierInterceptor : public ComputeInterceptor {
+class AmplifierInterceptor final : public ComputeInterceptor {
  public:
   AmplifierInterceptor(int64_t interceptor_id, TaskNode* node);
 
diff --git a/paddle/fluid/distributed/fleet_executor/carrier.cc b/paddle/fluid/distributed/fleet_executor/carrier.cc
index 6fb0d55a4859ef39d04857d39d1e70f6a31bb4a3..3449c87998a9dba21824e854afdb7216cb818164 100644
--- a/paddle/fluid/distributed/fleet_executor/carrier.cc
+++ b/paddle/fluid/distributed/fleet_executor/carrier.cc
@@ -71,6 +71,9 @@ void Carrier::Init(
     microbatch_scopes_[i] = &minibatch_scope_->NewScope();
     CopyParameters(i, program, inference_root_scope_vars);
   }
+  // Add source and sink interceptor id to rank
+  interceptor_id_to_rank_.emplace(SOURCE_ID, rank);
+  interceptor_id_to_rank_.emplace(SINK_ID, rank);
 
   // TODO(fleet_exe dev): thread pool
   thread_num_ = 1;
@@ -159,16 +162,10 @@ void Carrier::Start() {
                     true,
                     platform::errors::PreconditionNotMet(
                         "Using carrier before initialized."));
-  for (int64_t id : source_interceptor_ids_) {
-    VLOG(3) << "Carrier Start is sending start to source interceptor " << id
-            << ".";
-    InterceptorMessage start_msg;
-    // source node data_is_ready is send by carrier, so set src_id=-1
-    start_msg.set_src_id(-1);
-    start_msg.set_dst_id(id);
-    start_msg.set_message_type(DATA_IS_READY);
-    Send(start_msg);
-  }
+  InterceptorMessage start_msg;
+  start_msg.set_dst_id(SOURCE_ID);
+  start_msg.set_message_type(START);
+  Send(start_msg);
   // TODO(wangxi): async step
   Wait();
   dev_ctx_->Wait();
@@ -270,6 +267,38 @@ void Carrier::CreateInterceptors() {
 
   auto gc = GetGC(place_);
 
+  // create source and sink task node
+  auto max_run_times = microbatch_scopes_.size();
+  TaskNode* source = new TaskNode(
+      rank_, SOURCE_ID, max_run_times);  // rank, task_id, max_run_times
+  TaskNode* sink = new TaskNode(rank_, SINK_ID, max_run_times);
+  // find nodes without upstreams or without downstreams
+  std::vector<TaskNode*> origin_sources, origin_sinks;
+  for (const auto& item : interceptor_id_to_node_) {
+    TaskNode* task_node = item.second;
+    if (task_node->upstream().empty()) {
+      origin_sources.emplace_back(task_node);
+    }
+    if (task_node->downstream().empty()) {
+      origin_sinks.emplace_back(task_node);
+    }
+  }
+  // link source node with origin source
+  for (const auto& node : origin_sources) {
+    source->AddDownstreamTask(node->task_id(),
+                              std::numeric_limits<int64_t>::max());
+    node->AddUpstreamTask(SOURCE_ID, std::numeric_limits<int64_t>::max());
+  }
+  // link sink node with origin sink
+  for (const auto& node : origin_sinks) {
+    sink->AddUpstreamTask(node->task_id(), std::numeric_limits<int64_t>::max());
+    node->AddDownstreamTask(SINK_ID, std::numeric_limits<int64_t>::max());
+  }
+  // create source and sink interceptor
+  SetInterceptor(SOURCE_ID,
+                 InterceptorFactory::Create("Source", SOURCE_ID, source));
+  SetInterceptor(SINK_ID, InterceptorFactory::Create("Sink", SINK_ID, sink));
+
   // create each Interceptor
   // no auto init since there is no config
   for (const auto& item : interceptor_id_to_node_) {
@@ -303,9 +332,15 @@ void Carrier::CreateInterceptors() {
     VLOG(3) << "Create Interceptor with interceptor id: " << interceptor_id
             << " with type: " << task_node->type() << ".";
 
-    if (task_node->upstream().empty()) {
-      source_interceptor_ids_.emplace_back(interceptor_id);
-    }
+    PADDLE_ENFORCE_EQ(
+        task_node->upstream().empty(),
+        false,
+        platform::errors::PreconditionNotMet(
+            "There should not have normal nodes as source nodes"));
+    PADDLE_ENFORCE_EQ(task_node->downstream().empty(),
+                      false,
+                      platform::errors::PreconditionNotMet(
+                          "There should not have normal nodes as sink nodes"));
   }
 }
 
diff --git a/paddle/fluid/distributed/fleet_executor/carrier.h b/paddle/fluid/distributed/fleet_executor/carrier.h
index fe3d492676655838f6f077718ef65681bcdb53cb..2523942e06223f6210461a625a1a3bce2dcedb92 100644
--- a/paddle/fluid/distributed/fleet_executor/carrier.h
+++ b/paddle/fluid/distributed/fleet_executor/carrier.h
@@ -100,8 +100,6 @@ class Carrier final {
   std::unordered_map<int64_t, std::unique_ptr<Interceptor>>
       interceptor_idx_to_interceptor_;
 
-  std::vector<int64_t> source_interceptor_ids_;
-
   bool is_init_{false};
 
   std::mutex running_mutex_;
diff --git a/paddle/fluid/distributed/fleet_executor/compute_interceptor.cc b/paddle/fluid/distributed/fleet_executor/compute_interceptor.cc
index 5b96ee76e7144692bad974c14a2bce1f6ae2f3b4..5017f81523c8aea31fb8732e001e4af311313d32 100644
--- a/paddle/fluid/distributed/fleet_executor/compute_interceptor.cc
+++ b/paddle/fluid/distributed/fleet_executor/compute_interceptor.cc
@@ -34,29 +34,10 @@ void ComputeInterceptor::PrepareDeps() {
 
   for (auto up : upstream) {
     in_readys_.emplace(up.first, std::make_pair(up.second, 0));
-    in_stops_.emplace(up.first, false);
   }
   for (auto down : downstream) {
     out_buffs_.emplace(down.first, std::make_pair(down.second, 0));
   }
-
-  // source compute node, should we add a new SourceInterceptor?
-  if (upstream.empty()) {
-    is_source_ = true;
-    PADDLE_ENFORCE_GT(node_->max_run_times(),
-                      0,
-                      platform::errors::InvalidArgument(
-                          "Source ComputeInterceptor must run at least one "
-                          "times, but now max_run_times=%ld",
-                          node_->max_run_times()));
-    in_readys_.emplace(-1,
-                       std::make_pair(std::numeric_limits<int64_t>::max(), 0));
-  }
-
-  // If there is no downstream or every downstream is in different rank,
-  // then this interceptor is the last one for current rank.
-  // This can be get during init, can be cached for later use.
-  is_last_ = downstream.empty();
 }
 
 void ComputeInterceptor::IncreaseReady(int64_t up_id) {
@@ -66,12 +47,6 @@ void ComputeInterceptor::IncreaseReady(int64_t up_id) {
                     platform::errors::NotFound(
                         "Cannot find upstream=%lld in in_readys.", up_id));
 
-  // source node has no upstream, data_is_ready is send by carrier or others
-  if (is_source_ && up_id == -1) {
-    it->second.second += GetTaskNode()->max_run_times();
-    return;
-  }
-
   auto max_ready_size = it->second.first;
   auto ready_size = it->second.second;
   ready_size += 1;
@@ -152,7 +127,7 @@ void ComputeInterceptor::SendDataReadyToDownStream() {
     ready_msg.set_message_type(DATA_IS_READY);
     VLOG(3) << "ComputeInterceptor " << interceptor_id_
             << " Send data_is_ready msg to " << down_id
-            << " for step: " << step_;
+            << " in scope: " << cur_scope_id_;
     Send(down_id, ready_msg);
   }
 }
@@ -173,8 +148,7 @@ void ComputeInterceptor::ReplyCompletedToUpStream() {
 
     VLOG(3) << "ComputeInterceptor " << interceptor_id_
             << " Reply data_is_useless msg to " << up_id
-            << " for step: " << step_;
-    if (is_source_ && up_id == -1) return;
+            << " in scope: " << cur_scope_id_;
 
     InterceptorMessage reply_msg;
     reply_msg.set_message_type(DATA_IS_USELESS);
@@ -183,16 +157,20 @@ void ComputeInterceptor::ReplyCompletedToUpStream() {
 }
 
 void ComputeInterceptor::RunOps() {
-  VLOG(3) << "ComputeInterceptor " << interceptor_id_ << " running ops for the "
-          << step_ + 1 << " time.";
   for (auto op : node_->ops()) {
-    op->Run(*microbatch_scopes_[step_ % node_->max_run_times()], place_);
+    PADDLE_ENFORCE_LT(cur_scope_id_,
+                      microbatch_scopes_.size(),
+                      platform::errors::InvalidArgument(
+                          "Step out of range. There are %ld "
+                          "microbatch_scopes, but recevice scope index %ld",
+                          microbatch_scopes_.size(),
+                          cur_scope_id_));
+    op->Run(*microbatch_scopes_[cur_scope_id_], place_);
     if (gc_) {
-      framework::DeleteUnusedTensors(
-          *microbatch_scopes_[step_ % node_->max_run_times()],
-          op,
-          node_->unused_vars(),
-          gc_.get());
+      framework::DeleteUnusedTensors(*microbatch_scopes_[cur_scope_id_],
+                                     op,
+                                     node_->unused_vars(),
+                                     gc_.get());
     }
   }
 }
@@ -201,77 +179,28 @@ void ComputeInterceptor::Run() {
   while (IsInputReady() && CanWriteOutput()) {
     VLOG(3) << "id=" << GetInterceptorId() << " ComputeInterceptor running";
 
+    // get the ready scope id from queue
+    cur_scope_id_ = ready_queue_.front();
+    ready_queue_.pop();
+
     RunOps();
-    ++step_;
 
     // send to downstream and increase buff used
     SendDataReadyToDownStream();
     // reply to upstream and decrease ready data
     ReplyCompletedToUpStream();
-    // Try to stop Carrier
-    if (is_last_ && (step_ % node_->max_run_times() == 0)) {
-      VLOG(3) << "Interceptor " << GetInterceptorId()
-              << " is stopping carrier.";
-      // FIXME(wangxi): with multi sink interceptor
-      StopCarrier();
-    }
-  }
-}
-
-void ComputeInterceptor::ReceivedStop(int64_t up_id) {
-  received_stop_ = true;
-
-  // source node has no upstream, stop is send by carrier or others
-  if (is_source_ && up_id == -1) return;
-
-  auto it = in_stops_.find(up_id);
-  PADDLE_ENFORCE_NE(it,
-                    in_stops_.end(),
-                    platform::errors::NotFound(
-                        "Cannot find upstream=%lld in in_stops.", up_id));
-  PADDLE_ENFORCE_EQ(
-      it->second,
-      false,
-      platform::errors::AlreadyExists("Already received stop from %lld, stop "
-                                      "cannot be send more than once."));
-  it->second = true;
-}
-
-void ComputeInterceptor::TryStop() {
-  if (!received_stop_) return;
-
-  // can stop only when all upstream is stop and
-  // downstream complete
-  for (auto& in_stop : in_stops_) {
-    if (!in_stop.second) return;
-  }
-  for (auto& out_buff : out_buffs_) {
-    auto used_size = out_buff.second.second;
-    if (used_size != 0) return;
   }
-
-  // send stop to downstream
-  for (auto& out : out_buffs_) {
-    auto down_id = out.first;
-    InterceptorMessage stop;
-    stop.set_message_type(STOP);
-    Send(down_id, stop);
-  }
-  stop_ = true;
 }
 
 void ComputeInterceptor::Compute(const InterceptorMessage& msg) {
   if (msg.message_type() == DATA_IS_READY) {
     IncreaseReady(msg.src_id());
+    ready_queue_.push(msg.scope_idx());
     Run();
   } else if (msg.message_type() == DATA_IS_USELESS) {
     DecreaseBuff(msg.src_id());
     Run();
-  } else if (msg.message_type() == STOP) {
-    ReceivedStop(msg.src_id());
   }
-
-  TryStop();
 }
 
 REGISTER_INTERCEPTOR(Compute, ComputeInterceptor);
diff --git a/paddle/fluid/distributed/fleet_executor/compute_interceptor.h b/paddle/fluid/distributed/fleet_executor/compute_interceptor.h
index fb82ce76c7bdb851c32b1959121059cfca041b94..9709cd4437f1019fea80cf04ecce5a38f74bb463 100644
--- a/paddle/fluid/distributed/fleet_executor/compute_interceptor.h
+++ b/paddle/fluid/distributed/fleet_executor/compute_interceptor.h
@@ -14,6 +14,7 @@
 
 #pragma once
 
+#include <queue>
 #include <utility>
 
 #include "paddle/fluid/distributed/fleet_executor/interceptor.h"
@@ -30,7 +31,8 @@ class ComputeInterceptor : public Interceptor {
   virtual void SendDataReadyToDownStream();
   virtual void ReplyCompletedToUpStream();
 
-  int64_t step_{0};
+  std::queue<int64_t> ready_queue_;
+  int64_t cur_scope_id_;
 
  private:
   void PrepareDeps();
@@ -43,19 +45,10 @@ class ComputeInterceptor : public Interceptor {
   void Run();
   void Compute(const InterceptorMessage& msg);
 
-  void ReceivedStop(int64_t up_id);
-  void TryStop();
-
-  bool is_source_{false};
-  bool is_last_{false};
-
   // upstream_id-->(max_ready_size, ready_size)
   std::map<int64_t, std::pair<int64_t, int64_t>> in_readys_{};
   // downstream_id-->(max_buffer_size, used_size)
   std::map<int64_t, std::pair<int64_t, int64_t>> out_buffs_{};
-
-  bool received_stop_{false};
-  std::map<int64_t, bool> in_stops_{};
 };
 
 }  // namespace distributed
diff --git a/paddle/fluid/distributed/fleet_executor/interceptor.h b/paddle/fluid/distributed/fleet_executor/interceptor.h
index 6a761072027a924f21b38f7a694bba65b77e425d..2c20e1ad6113ecda58404429697fa4077fece492 100644
--- a/paddle/fluid/distributed/fleet_executor/interceptor.h
+++ b/paddle/fluid/distributed/fleet_executor/interceptor.h
@@ -93,7 +93,6 @@ class Interceptor {
   TaskNode* node_;
 
   // for stop
-  bool stop_{false};
   void StopCarrier();
 
   // for runtime
@@ -114,9 +113,6 @@ class Interceptor {
 
   std::mutex mutex_;
   std::deque<InterceptorMessage> messages_;
-
-  int64_t already_run_times_{0};
-  int64_t used_slot_nums_{0};
 };
 
 class InterceptorFactory {
diff --git a/paddle/fluid/distributed/fleet_executor/sink_interceptor.h b/paddle/fluid/distributed/fleet_executor/sink_interceptor.h
index cb1d698a78526fdde61586304e588e8009340584..1abb7a641e23a5237570b9f469009f4fa3fb72a7 100644
--- a/paddle/fluid/distributed/fleet_executor/sink_interceptor.h
+++ b/paddle/fluid/distributed/fleet_executor/sink_interceptor.h
@@ -25,7 +25,7 @@ namespace distributed {
  *   1. record the num of micro-step
  *   2. check whether to notify carrier the current step is finished
  */
-class SinkInterceptor : public Interceptor {
+class SinkInterceptor final : public Interceptor {
  public:
   SinkInterceptor(int64_t interceptor_id, TaskNode* node);
 
diff --git a/paddle/fluid/distributed/fleet_executor/source_interceptor.h b/paddle/fluid/distributed/fleet_executor/source_interceptor.h
index f8b18fb1848645c44c75db90a7d123ba48aeae21..95e8c1b3b03781a653152219a73e6b590cced631 100644
--- a/paddle/fluid/distributed/fleet_executor/source_interceptor.h
+++ b/paddle/fluid/distributed/fleet_executor/source_interceptor.h
@@ -25,7 +25,7 @@ namespace distributed {
  *   1. receive `start` message from carrier
  *   2. send num_of_steps `data_is_ready` message to downstream
  */
-class SourceInterceptor : public Interceptor {
+class SourceInterceptor final : public Interceptor {
  public:
   SourceInterceptor(int64_t interceptor_id, TaskNode* node);
 
diff --git a/paddle/fluid/distributed/fleet_executor/test/compute_interceptor_test.cc b/paddle/fluid/distributed/fleet_executor/test/compute_interceptor_test.cc
index 4992a8b34c9da163af6bb64cad0094da9142afb2..e484031161489f4e6cd54403fbd15da0128433e8 100644
--- a/paddle/fluid/distributed/fleet_executor/test/compute_interceptor_test.cc
+++ b/paddle/fluid/distributed/fleet_executor/test/compute_interceptor_test.cc
@@ -25,57 +25,42 @@ limitations under the License. */
 namespace paddle {
 namespace distributed {
 
-class StartInterceptor : public Interceptor {
- public:
-  StartInterceptor(int64_t interceptor_id, TaskNode* node)
-      : Interceptor(interceptor_id, node) {
-    RegisterMsgHandle([this](const InterceptorMessage& msg) { NOP(msg); });
-  }
-
-  void NOP(const InterceptorMessage& msg) {
-    if (msg.message_type() == STOP) {
-      stop_ = true;
-      InterceptorMessage stop;
-      stop.set_message_type(STOP);
-      Send(1, stop);  // stop 1, compute
-      return;
-    }
-    std::cout << GetInterceptorId() << " recv msg from " << msg.src_id()
-              << std::endl;
-  }
-};
-
 TEST(ComputeInterceptor, Compute) {
   std::string carrier_id = "0";
   Carrier* carrier =
       GlobalMap<std::string, Carrier>::Create(carrier_id, carrier_id);
-  carrier->Init(0, {{0, 0}, {1, 0}, {2, 0}});
+  carrier->Init(0, {{SOURCE_ID, 0}, {0, 0}, {1, 0}, {SINK_ID, 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* node_a = new TaskNode(0, 0, 0, 3, 0);  // role, rank, task_id
+  TaskNode* source =
+      new TaskNode(0, SOURCE_ID, 3);  // rank, task_id, max_run_times
+  TaskNode* node_a = new TaskNode(0, 0, 0, 3, 0);
   TaskNode* node_b = new TaskNode(0, 0, 1, 3, 0);
-  TaskNode* node_c = new TaskNode(0, 0, 2, 3, 0);
+  TaskNode* sink = new TaskNode(0, SINK_ID, 3);
 
-  // a->b->c
+  // source->a->b->sink
+  source->AddDownstreamTask(0);
+  node_a->AddUpstreamTask(SOURCE_ID);
   node_a->AddDownstreamTask(1, 3);
   node_b->AddUpstreamTask(0, 3);
-  node_b->AddDownstreamTask(2);
-  node_c->AddUpstreamTask(1);
+  node_b->AddDownstreamTask(SINK_ID);
+  sink->AddUpstreamTask(1);
 
-  Interceptor* a =
-      carrier->SetInterceptor(0, std::make_unique<StartInterceptor>(0, node_a));
+  carrier->SetInterceptor(
+      SOURCE_ID, InterceptorFactory::Create("Source", SOURCE_ID, source));
+  carrier->SetInterceptor(0, InterceptorFactory::Create("Compute", 0, node_a));
   carrier->SetInterceptor(1, InterceptorFactory::Create("Compute", 1, node_b));
-  carrier->SetInterceptor(2, InterceptorFactory::Create("Compute", 2, node_c));
+  carrier->SetInterceptor(SINK_ID,
+                          InterceptorFactory::Create("Sink", SINK_ID, sink));
 
+  // start
   InterceptorMessage msg;
-  msg.set_message_type(DATA_IS_READY);
-  // test run three times
-  a->Send(1, msg);
-  a->Send(1, msg);
-  a->Send(1, msg);
+  msg.set_message_type(START);
+  msg.set_dst_id(SOURCE_ID);
+  carrier->EnqueueInterceptorMessage(msg);
 
   carrier->Wait();
   carrier->Release();
diff --git a/paddle/fluid/distributed/fleet_executor/test/interceptor_ping_pong_test.cc b/paddle/fluid/distributed/fleet_executor/test/interceptor_ping_pong_test.cc
index 54adf06fb67ddf6e5d9ac803b3aa097289c33c38..f43f3860199fb772bc5d4537a41490a70c8270e5 100644
--- a/paddle/fluid/distributed/fleet_executor/test/interceptor_ping_pong_test.cc
+++ b/paddle/fluid/distributed/fleet_executor/test/interceptor_ping_pong_test.cc
@@ -33,7 +33,6 @@ class PingPongInterceptor : public Interceptor {
 
   void PingPong(const InterceptorMessage& msg) {
     if (msg.message_type() == STOP) {
-      stop_ = true;
       return;
     }
     std::cout << GetInterceptorId() << " recv msg, count=" << count_
diff --git a/paddle/fluid/distributed/fleet_executor/test/interceptor_ping_pong_with_brpc_test.cc b/paddle/fluid/distributed/fleet_executor/test/interceptor_ping_pong_with_brpc_test.cc
index 3828c4478cbe6eecad18a88ce5501eae84eb0589..62c23068d7d4a9eb6574aacc53d0c258ae2ddc51 100644
--- a/paddle/fluid/distributed/fleet_executor/test/interceptor_ping_pong_with_brpc_test.cc
+++ b/paddle/fluid/distributed/fleet_executor/test/interceptor_ping_pong_with_brpc_test.cc
@@ -36,7 +36,6 @@ class PingPongInterceptor : public Interceptor {
 
   void PingPong(const InterceptorMessage& msg) {
     if (msg.message_type() == STOP) {
-      stop_ = true;
       StopCarrier();
       return;
     }