diff --git a/seatunnel-connectors-v2/connector-file/connector-file-base/src/main/java/org/apache/seatunnel/connectors/seatunnel/file/sink/writer/OrcWriteStrategy.java b/seatunnel-connectors-v2/connector-file/connector-file-base/src/main/java/org/apache/seatunnel/connectors/seatunnel/file/sink/writer/OrcWriteStrategy.java
index e4978879f856..42dedca14513 100644
--- a/seatunnel-connectors-v2/connector-file/connector-file-base/src/main/java/org/apache/seatunnel/connectors/seatunnel/file/sink/writer/OrcWriteStrategy.java
+++ b/seatunnel-connectors-v2/connector-file/connector-file-base/src/main/java/org/apache/seatunnel/connectors/seatunnel/file/sink/writer/OrcWriteStrategy.java
@@ -166,7 +166,7 @@ private TypeDescription buildFieldWithRowType(SeaTunnelDataType<?> type) {
                 TypeDescription struct = TypeDescription.createStruct();
                 SeaTunnelDataType<?>[] fieldTypes = ((SeaTunnelRowType) type).getFieldTypes();
                 for (int i = 0; i < fieldTypes.length; i++) {
-                    struct.addField(((SeaTunnelRowType) type).getFieldName(i), buildFieldWithRowType(fieldTypes[i]));
+                    struct.addField(((SeaTunnelRowType) type).getFieldName(i).toLowerCase(), buildFieldWithRowType(fieldTypes[i]));
                 }
                 return struct;
             case NULL: