diff --git a/fe/fe-core/src/main/java/org/apache/doris/planner/external/jdbc/JdbcFunctionPushDownRule.java b/fe/fe-core/src/main/java/org/apache/doris/planner/external/jdbc/JdbcFunctionPushDownRule.java
index d1a44cb700..35d069c12c 100644
--- a/fe/fe-core/src/main/java/org/apache/doris/planner/external/jdbc/JdbcFunctionPushDownRule.java
+++ b/fe/fe-core/src/main/java/org/apache/doris/planner/external/jdbc/JdbcFunctionPushDownRule.java
@@ -45,6 +45,7 @@ public class JdbcFunctionPushDownRule {
 
     static {
         CLICKHOUSE_SUPPORTED_FUNCTIONS.add("from_unixtime");
+        CLICKHOUSE_SUPPORTED_FUNCTIONS.add("unix_timestamp");
     }
 
     private static boolean isMySQLFunctionUnsupported(String functionName) {
@@ -70,6 +71,7 @@ public class JdbcFunctionPushDownRule {
 
     static {
         REPLACE_CLICKHOUSE_FUNCTIONS.put("from_unixtime", "FROM_UNIXTIME");
+        REPLACE_CLICKHOUSE_FUNCTIONS.put("unix_timestamp", "toUnixTimestamp");
     }
 
     private static boolean isReplaceClickHouseFunctions(String functionName) {
@@ -105,14 +107,14 @@ public class JdbcFunctionPushDownRule {
 
             Preconditions.checkArgument(!func.isEmpty(), "function can not be empty");
 
-            func = replaceFunctionNameIfNecessary(func, replaceFunction, functionCallExpr, tableType);
-
-            if (!func.isEmpty() && checkFunction.test(func)) {
+            if (checkFunction.test(func)) {
                 String errMsg = "Unsupported function: " + func + " in expr: " + expr.toMySql()
                         + " in JDBC Table Type: " + tableType;
                 LOG.warn(errMsg);
                 errors.add(errMsg);
             }
+
+            replaceFunctionNameIfNecessary(func, replaceFunction, functionCallExpr, tableType);
         }
 
         List<Expr> children = expr.getChildren();
diff --git a/regression-test/data/external_table_p0/jdbc/test_clickhouse_jdbc_catalog.out b/regression-test/data/external_table_p0/jdbc/test_clickhouse_jdbc_catalog.out
index 05372e3f0a..d6591a4828 100644
Binary files a/regression-test/data/external_table_p0/jdbc/test_clickhouse_jdbc_catalog.out and b/regression-test/data/external_table_p0/jdbc/test_clickhouse_jdbc_catalog.out differ
diff --git a/regression-test/suites/external_table_p0/jdbc/test_clickhouse_jdbc_catalog.groovy b/regression-test/suites/external_table_p0/jdbc/test_clickhouse_jdbc_catalog.groovy
index b01f200574..8fb0f32399 100644
--- a/regression-test/suites/external_table_p0/jdbc/test_clickhouse_jdbc_catalog.groovy
+++ b/regression-test/suites/external_table_p0/jdbc/test_clickhouse_jdbc_catalog.groovy
@@ -75,7 +75,12 @@ suite("test_clickhouse_jdbc_catalog", "p0,external,clickhouse,external_docker,ex
         }
         explain {
             sql("select * from ts where nvl(ts,null) >= '2022-01-01';")
-            contains """QUERY: SELECT "id", "ts" FROM "doris_test"."ts""""
+            contains """QUERY: SELECT "id", "ts" FROM "doris_test"."ts"""
+        }
+        order_qt_func_push2 """select * from ts where ts <= unix_timestamp(from_unixtime(ts,'yyyyMMdd'));"""
+        explain {
+            sql("select * from ts where ts <= unix_timestamp(from_unixtime(ts,'yyyy-MM-dd'));")
+            contains """QUERY: SELECT "id", "ts" FROM "doris_test"."ts" WHERE (ts <= toUnixTimestamp(FROM_UNIXTIME(ts, '%Y-%m-%d')))"""
         }
 
         sql """ drop catalog if exists ${catalog_name} """