diff --git a/fe/fe-core/src/main/java/org/apache/doris/nereids/processor/post/CommonSubExpressionOpt.java b/fe/fe-core/src/main/java/org/apache/doris/nereids/processor/post/CommonSubExpressionOpt.java
index 194116cf31..44e65dee1c 100644
--- a/fe/fe-core/src/main/java/org/apache/doris/nereids/processor/post/CommonSubExpressionOpt.java
+++ b/fe/fe-core/src/main/java/org/apache/doris/nereids/processor/post/CommonSubExpressionOpt.java
@@ -51,10 +51,12 @@ import java.util.Set;
 public class CommonSubExpressionOpt extends PlanPostProcessor {
     @Override
     public PhysicalProject visitPhysicalProject(PhysicalProject<? extends Plan> project, CascadesContext ctx) {
-
-        List<List<NamedExpression>> multiLayers = computeMultiLayerProjections(
-                project.getInputSlots(), project.getProjects());
-        project.setMultiLayerProjects(multiLayers);
+        project.child().accept(this, ctx);
+        if (!project.hasPushedDownToProjectionFunctions()) {
+            List<List<NamedExpression>> multiLayers = computeMultiLayerProjections(
+                    project.getInputSlots(), project.getProjects());
+            project.setMultiLayerProjects(multiLayers);
+        }
         return project;
     }
 
@@ -66,15 +68,6 @@ public class CommonSubExpressionOpt extends PlanPostProcessor {
         for (Expression expr : projects) {
             expr.accept(collector, null);
         }
-        Map<Expression, Alias> commonExprToAliasMap = new HashMap<>();
-        collector.commonExprByDepth.values().stream().flatMap(expressions -> expressions.stream())
-                .forEach(expression -> {
-                    if (expression instanceof Alias) {
-                        commonExprToAliasMap.put(expression, (Alias) expression);
-                    } else {
-                        commonExprToAliasMap.put(expression, new Alias(expression));
-                    }
-                });
         Map<Expression, Alias> aliasMap = new HashMap<>();
         if (!collector.commonExprByDepth.isEmpty()) {
             for (int i = 1; i <= collector.commonExprByDepth.size(); i++) {
diff --git a/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/plans/physical/PhysicalProject.java b/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/plans/physical/PhysicalProject.java
index e8472b6af2..a88ef8dc50 100644
--- a/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/plans/physical/PhysicalProject.java
+++ b/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/plans/physical/PhysicalProject.java
@@ -85,9 +85,13 @@ public class PhysicalProject<CHILD_TYPE extends Plan> extends PhysicalUnary<CHIL
 
     @Override
     public String toString() {
+        StringBuilder cse = new StringBuilder();
+        for (int i = 0; i < multiLayerProjects.size(); i++) {
+            List<NamedExpression> layer = multiLayerProjects.get(i);
+            cse.append("l").append(i).append("(").append(layer).append(")");
+        }
         return Utils.toSqlString("PhysicalProject[" + id.asInt() + "]" + getGroupIdWithPrefix(),
-                "stats", statistics, "projects", projects
-
+                "stats", statistics, "projects", projects, "multi_proj", cse.toString()
         );
     }