diff --git a/fe/fe-core/src/main/java/com/starrocks/sql/analyzer/MaterializedViewAnalyzer.java b/fe/fe-core/src/main/java/com/starrocks/sql/analyzer/MaterializedViewAnalyzer.java
index bf06d6783bc6cb..bc9d984bce50c4 100644
--- a/fe/fe-core/src/main/java/com/starrocks/sql/analyzer/MaterializedViewAnalyzer.java
+++ b/fe/fe-core/src/main/java/com/starrocks/sql/analyzer/MaterializedViewAnalyzer.java
@@ -62,6 +62,7 @@
 import com.starrocks.mv.analyzer.MVPartitionSlotRefResolver;
 import com.starrocks.qe.ConnectContext;
 import com.starrocks.server.GlobalStateMgr;
+import com.starrocks.server.RunMode;
 import com.starrocks.sql.ast.AlterMaterializedViewStmt;
 import com.starrocks.sql.ast.AstVisitor;
 import com.starrocks.sql.ast.CancelRefreshMaterializedViewStmt;
@@ -1091,17 +1092,17 @@ private void checkDistribution(CreateMaterializedViewStatement statement,
 
         private Short autoInferReplicationNum(Map<TableName, Table> tableNameTableMap) {
             // For replication_num, we select the maximum value of all tables replication_num
-            Short defaultReplicationNum = 1;
+            Optional<Short> maxReplicationFromTable = Optional.empty();
             for (Table table : tableNameTableMap.values()) {
                 if (table instanceof OlapTable) {
                     OlapTable olapTable = (OlapTable) table;
                     Short replicationNum = olapTable.getDefaultReplicationNum();
-                    if (replicationNum > defaultReplicationNum) {
-                        defaultReplicationNum = replicationNum;
+                    if (maxReplicationFromTable.isEmpty() || replicationNum > maxReplicationFromTable.get()) {
+                        maxReplicationFromTable = Optional.of(replicationNum);
                     }
                 }
             }
-            return defaultReplicationNum;
+            return maxReplicationFromTable.orElseGet(RunMode::defaultReplicationNum);
         }
 
         @Override
diff --git a/fe/fe-core/src/test/java/com/starrocks/sql/analyzer/MaterializedViewAnalyzerTest.java b/fe/fe-core/src/test/java/com/starrocks/sql/analyzer/MaterializedViewAnalyzerTest.java
index ce47de07798107..b42bf2891295a5 100644
--- a/fe/fe-core/src/test/java/com/starrocks/sql/analyzer/MaterializedViewAnalyzerTest.java
+++ b/fe/fe-core/src/test/java/com/starrocks/sql/analyzer/MaterializedViewAnalyzerTest.java
@@ -26,10 +26,17 @@
 import com.starrocks.catalog.ScalarType;
 import com.starrocks.catalog.Table;
 import com.starrocks.catalog.Type;
+import com.starrocks.common.Config;
 import com.starrocks.common.DdlException;
 import com.starrocks.common.Pair;
+import com.starrocks.common.util.PropertyAnalyzer;
 import com.starrocks.qe.ShowExecutor;
 import com.starrocks.qe.ShowResultSet;
+<<<<<<< HEAD
+=======
+import com.starrocks.server.GlobalStateMgr;
+import com.starrocks.sql.ast.CreateMaterializedViewStatement;
+>>>>>>> eb8fdb9a41 ([Enhancement] change default_replication_num of MV (#50931))
 import com.starrocks.sql.ast.ShowStmt;
 import com.starrocks.sql.plan.ConnectorPlanTestBase;
 import com.starrocks.utframe.StarRocksAssert;
@@ -39,6 +46,7 @@
 import org.apache.hadoop.util.Lists;
 import org.junit.Assert;
 import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.Assertions;
 import org.junit.jupiter.api.BeforeAll;
 import org.junit.jupiter.api.RepeatedTest;
 import org.junit.jupiter.api.Test;
@@ -483,4 +491,32 @@ private void checkQueryOutputIndices(List<Integer> inputs, String expect, boolea
         Assert.assertEquals(IntStream.range(0, queryOutputIndices.size()).anyMatch(i -> i != queryOutputIndices.get(i)),
                 isChanged);
     }
+
+    @Test
+    public void testReplicationNum() throws Exception {
+        short defaultReplication = Config.default_replication_num;
+        final String sql = "create materialized view mv1 refresh manual as " +
+                "SELECT id, data, date  FROM `iceberg0`.`partitioned_db`.`t1` as a;";
+
+        {
+            Config.default_replication_num = 1;
+            CreateMaterializedViewStatement statementBase =
+                    (CreateMaterializedViewStatement) UtFrameUtils.parseStmtWithNewParser(sql,
+                            starRocksAssert.getCtx());
+            MaterializedViewAnalyzer.analyze(statementBase, starRocksAssert.getCtx());
+            Assertions.assertEquals("1",
+                    statementBase.getProperties().get(PropertyAnalyzer.PROPERTIES_REPLICATION_NUM));
+        }
+        {
+            Config.default_replication_num = 3;
+            CreateMaterializedViewStatement statementBase =
+                    (CreateMaterializedViewStatement) UtFrameUtils.parseStmtWithNewParser(sql,
+                            starRocksAssert.getCtx());
+            MaterializedViewAnalyzer.analyze(statementBase, starRocksAssert.getCtx());
+            Assertions.assertEquals("3",
+                    statementBase.getProperties().get(PropertyAnalyzer.PROPERTIES_REPLICATION_NUM));
+        }
+
+        Config.default_replication_num = defaultReplication;
+    }
 }