diff --git a/fe/fe-core/src/main/java/org/apache/doris/qe/Coordinator.java b/fe/fe-core/src/main/java/org/apache/doris/qe/Coordinator.java
index 9be2abb0d4..a8a08fb0e6 100644
--- a/fe/fe-core/src/main/java/org/apache/doris/qe/Coordinator.java
+++ b/fe/fe-core/src/main/java/org/apache/doris/qe/Coordinator.java
@@ -380,7 +380,9 @@ public class Coordinator implements CoordInterface {
             this.queryOptions.setResourceLimit(resourceLimit);
         }
         // set exec mem limit
-        long memLimit = Env.getCurrentEnv().getAuth().getExecMemLimit(qualifiedUser);
+        long maxExecMemByte = connectContext.getSessionVariable().getMaxExecMemByte();
+        long memLimit = maxExecMemByte > 0 ? maxExecMemByte :
+                Env.getCurrentEnv().getAuth().getExecMemLimit(qualifiedUser);
         if (memLimit > 0) {
             // overwrite the exec_mem_limit from session variable;
             this.queryOptions.setMemLimit(memLimit);