diff --git a/modules/planning/conf/scenario_side_pass_config.pb.txt b/modules/planning/conf/scenario_side_pass_config.pb.txt
index 95b08884e2682b4a82b8ccebde4402f6f46e3106..76f8932266ecbba42922980d990c07f4bf0350ec 100644
--- a/modules/planning/conf/scenario_side_pass_config.pb.txt
+++ b/modules/planning/conf/scenario_side_pass_config.pb.txt
@@ -10,6 +10,7 @@ side_pass_config: {
   approach_obstacle_max_stop_speed: 1.0e-5
   approach_obstacle_min_stop_distance: 4.0
   block_obstacle_min_speed: 0.1
+  enable_obstacle_blocked_check: true
 }
 stage_config: {
   stage_type: SIDE_PASS_APPROACH_OBSTACLE
diff --git a/modules/planning/proto/planning_config.proto b/modules/planning/proto/planning_config.proto
index c16556fe322aa9380725e2fd9c67652498b1b336..cf3f3137e7359cf64aaca00983c49369df68e700 100644
--- a/modules/planning/proto/planning_config.proto
+++ b/modules/planning/proto/planning_config.proto
@@ -72,6 +72,8 @@ message ScenarioSidePassConfig {
   optional double approach_obstacle_max_stop_speed = 2 [default = 1.0e-5];
   optional double approach_obstacle_min_stop_distance = 3 [default = 4.0];
   optional double block_obstacle_min_speed = 4 [default = 0.1]; // m/s
+  // set to false to work around large vehicle splitting issue in perception
+  optional bool enable_obstacle_blocked_check = 5 [default = true];
 }
 
 message ScenarioStopSignUnprotectedConfig {
diff --git a/modules/planning/scenarios/side_pass/side_pass_scenario.cc b/modules/planning/scenarios/side_pass/side_pass_scenario.cc
index 0005a527489ff33ad97e819c68e8eba46fbcc0de..51a7c202a3c1c218ca5b4e583121a6c65f3c915b 100644
--- a/modules/planning/scenarios/side_pass/side_pass_scenario.cc
+++ b/modules/planning/scenarios/side_pass/side_pass_scenario.cc
@@ -1,3 +1,4 @@
+
 /******************************************************************************
  * Copyright 2018 The Apollo Authors. All Rights Reserved.
  *
@@ -211,27 +212,29 @@ bool SidePassScenario::HasBlockingObstacle(const Frame& frame) {
     }
 
     bool is_blocked_by_others = false;
-    for (const auto* other_obstacle : path_decision.obstacles().Items()) {
-      if (other_obstacle->Id() == obstacle->Id()) {
-        continue;
-      }
-      if (other_obstacle->PerceptionSLBoundary().start_l() >
-              obstacle->PerceptionSLBoundary().end_l() ||
-          other_obstacle->PerceptionSLBoundary().end_l() <
-              obstacle->PerceptionSLBoundary().start_l()) {
-        // not blocking the backside vehicle
-        continue;
-      }
-
-      double delta_s = other_obstacle->PerceptionSLBoundary().start_s() -
-                       obstacle->PerceptionSLBoundary().end_s();
-      if (delta_s < 0.0 || delta_s > kAdcDistanceThreshold) {
-        continue;
-      } else {
-        // TODO(All): fixed the segmentation bug for large vehicles, otherwise
-        // the follow line will be problematic.
-        is_blocked_by_others = true;
-        break;
+    if (side_pass_context_.scenario_config_.enable_obstacle_blocked_check()) {
+      for (const auto* other_obstacle : path_decision.obstacles().Items()) {
+        if (other_obstacle->Id() == obstacle->Id()) {
+          continue;
+        }
+        if (other_obstacle->PerceptionSLBoundary().start_l() >
+                obstacle->PerceptionSLBoundary().end_l() ||
+            other_obstacle->PerceptionSLBoundary().end_l() <
+                obstacle->PerceptionSLBoundary().start_l()) {
+          // not blocking the backside vehicle
+          continue;
+        }
+
+        double delta_s = other_obstacle->PerceptionSLBoundary().start_s() -
+            obstacle->PerceptionSLBoundary().end_s();
+        if (delta_s < 0.0 || delta_s > kAdcDistanceThreshold) {
+          continue;
+        } else {
+          // TODO(All): fixed the segmentation bug for large vehicles, otherwise
+          // the follow line will be problematic.
+          is_blocked_by_others = true;
+          break;
+        }
       }
     }
 
diff --git a/modules/planning/testdata/conf/scenario_side_pass_config.pb.txt b/modules/planning/testdata/conf/scenario_side_pass_config.pb.txt
index 95b08884e2682b4a82b8ccebde4402f6f46e3106..76f8932266ecbba42922980d990c07f4bf0350ec 100644
--- a/modules/planning/testdata/conf/scenario_side_pass_config.pb.txt
+++ b/modules/planning/testdata/conf/scenario_side_pass_config.pb.txt
@@ -10,6 +10,7 @@ side_pass_config: {
   approach_obstacle_max_stop_speed: 1.0e-5
   approach_obstacle_min_stop_distance: 4.0
   block_obstacle_min_speed: 0.1
+  enable_obstacle_blocked_check: true
 }
 stage_config: {
   stage_type: SIDE_PASS_APPROACH_OBSTACLE