diff --git a/fe/fe-core/src/main/antlr4/org/apache/doris/nereids/DorisLexer.g4 b/fe/fe-core/src/main/antlr4/org/apache/doris/nereids/DorisLexer.g4
index a38a56c160..87a452b699 100644
--- a/fe/fe-core/src/main/antlr4/org/apache/doris/nereids/DorisLexer.g4
+++ b/fe/fe-core/src/main/antlr4/org/apache/doris/nereids/DorisLexer.g4
@@ -215,6 +215,7 @@ INTERSECT: 'INTERSECT';
 INTERVAL: 'INTERVAL';
 INTO: 'INTO';
 IS: 'IS';
+ISNULL: 'ISNULL';
 ITEMS: 'ITEMS';
 JOIN: 'JOIN';
 KEYS: 'KEYS';
diff --git a/fe/fe-core/src/main/antlr4/org/apache/doris/nereids/DorisParser.g4 b/fe/fe-core/src/main/antlr4/org/apache/doris/nereids/DorisParser.g4
index a5574ec63c..19543bce74 100644
--- a/fe/fe-core/src/main/antlr4/org/apache/doris/nereids/DorisParser.g4
+++ b/fe/fe-core/src/main/antlr4/org/apache/doris/nereids/DorisParser.g4
@@ -241,6 +241,7 @@ expression
 booleanExpression
     : NOT booleanExpression                                         #logicalNot
     | EXISTS LEFT_PAREN query RIGHT_PAREN                           #exist
+    | ISNULL LEFT_PAREN valueExpression RIGHT_PAREN        #isnull
     | valueExpression predicate?                                    #predicated
     | left=booleanExpression operator=AND right=booleanExpression   #logicalBinary
     | left=booleanExpression operator=OR right=booleanExpression    #logicalBinary
@@ -469,6 +470,7 @@ ansiNonReserved
     | INPUTFORMAT
     | INSERT
     | INTERVAL
+    | ISNULL
     | ITEMS
     | KEYS
     | LAST
diff --git a/fe/fe-core/src/main/java/org/apache/doris/nereids/parser/LogicalPlanBuilder.java b/fe/fe-core/src/main/java/org/apache/doris/nereids/parser/LogicalPlanBuilder.java
index 300784cdff..f824f0e875 100644
--- a/fe/fe-core/src/main/java/org/apache/doris/nereids/parser/LogicalPlanBuilder.java
+++ b/fe/fe-core/src/main/java/org/apache/doris/nereids/parser/LogicalPlanBuilder.java
@@ -48,6 +48,7 @@ import org.apache.doris.nereids.DorisParser.IdentifierListContext;
 import org.apache.doris.nereids.DorisParser.IdentifierSeqContext;
 import org.apache.doris.nereids.DorisParser.IntegerLiteralContext;
 import org.apache.doris.nereids.DorisParser.IntervalContext;
+import org.apache.doris.nereids.DorisParser.IsnullContext;
 import org.apache.doris.nereids.DorisParser.JoinCriteriaContext;
 import org.apache.doris.nereids.DorisParser.JoinRelationContext;
 import org.apache.doris.nereids.DorisParser.LimitClauseContext;
@@ -1329,6 +1330,11 @@ public class LogicalPlanBuilder extends DorisParserBaseVisitor<Object> {
         return ParserUtils.withOrigin(context, () -> new Exists(typedVisit(context.query()), false));
     }
 
+    @Override
+    public Expression visitIsnull(IsnullContext context) {
+        return ParserUtils.withOrigin(context, () -> new IsNull(typedVisit(context.valueExpression())));
+    }
+
     public List<Expression> withInList(PredicateContext ctx) {
         return ctx.expression().stream().map(this::getExpression).collect(ImmutableList.toImmutableList());
     }