diff --git a/inlong-sort/sort-formats/format-inlongmsg-base/pom.xml b/inlong-sort/sort-formats/format-inlongmsg-base/pom.xml
index 8a3f7207211..8846aa0446e 100644
--- a/inlong-sort/sort-formats/format-inlongmsg-base/pom.xml
+++ b/inlong-sort/sort-formats/format-inlongmsg-base/pom.xml
@@ -94,7 +94,7 @@
         <dependency>
             <groupId>org.apache.flink</groupId>
             <artifactId>flink-csv</artifactId>
-            <scope>test</scope>
+            <scope>provided</scope>
         </dependency>
 
     </dependencies>
diff --git a/inlong-sort/sort-formats/format-inlongmsg-base/src/main/java/org/apache/inlong/sort/formats/inlongmsg/InLongMsgDecodingFormat.java b/inlong-sort/sort-formats/format-inlongmsg-base/src/main/java/org/apache/inlong/sort/formats/inlongmsg/InLongMsgDecodingFormat.java
index 0f67bbc0726..b8eddb5ad58 100644
--- a/inlong-sort/sort-formats/format-inlongmsg-base/src/main/java/org/apache/inlong/sort/formats/inlongmsg/InLongMsgDecodingFormat.java
+++ b/inlong-sort/sort-formats/format-inlongmsg-base/src/main/java/org/apache/inlong/sort/formats/inlongmsg/InLongMsgDecodingFormat.java
@@ -17,6 +17,13 @@
 
 package org.apache.inlong.sort.formats.inlongmsg;
 
+import lombok.extern.slf4j.Slf4j;
+import org.apache.flink.formats.csv.CsvRowDataDeserializationSchema;
+import org.apache.flink.shaded.jackson2.com.fasterxml.jackson.databind.JsonNode;
+import org.apache.flink.shaded.jackson2.com.fasterxml.jackson.databind.ObjectReader;
+import org.apache.flink.shaded.jackson2.com.fasterxml.jackson.dataformat.csv.CsvMapper;
+import org.apache.flink.shaded.jackson2.com.fasterxml.jackson.dataformat.csv.CsvParser;
+import org.apache.flink.shaded.jackson2.com.fasterxml.jackson.dataformat.csv.CsvSchema;
 import org.apache.inlong.sort.formats.inlongmsg.InLongMsgDeserializationSchema.MetadataConverter;
 
 import org.apache.flink.api.common.serialization.DeserializationSchema;
@@ -31,6 +38,7 @@
 import org.apache.flink.table.types.DataType;
 import org.apache.flink.table.types.utils.DataTypeUtils;
 
+import java.lang.reflect.Field;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collections;
@@ -40,6 +48,7 @@
 import java.util.stream.Collectors;
 import java.util.stream.Stream;
 
+@Slf4j
 public class InLongMsgDecodingFormat implements DecodingFormat<DeserializationSchema<RowData>> {
 
     private final String innerFormatMetaPrefix;
@@ -50,14 +59,18 @@ public class InLongMsgDecodingFormat implements DecodingFormat<DeserializationSc
 
     private final boolean ignoreErrors;
 
+    private final boolean ignoreTrailingUnmappable;
+
     public InLongMsgDecodingFormat(
             DecodingFormat<DeserializationSchema<RowData>> innerDecodingFormat,
             String innerFormatMetaPrefix,
-            boolean ignoreErrors) {
+            boolean ignoreErrors,
+            boolean ignoreTrailingUnmappable) {
         this.innerDecodingFormat = innerDecodingFormat;
         this.innerFormatMetaPrefix = innerFormatMetaPrefix;
         this.metadataKeys = Collections.emptyList();
         this.ignoreErrors = ignoreErrors;
+        this.ignoreTrailingUnmappable = ignoreTrailingUnmappable;
     }
 
     @Override
@@ -83,8 +96,14 @@ public DeserializationSchema<RowData> createRuntimeDecoder(Context context, Data
         final TypeInformation<RowData> producedTypeInfo =
                 context.createTypeInformation(producedDataType);
 
+        DeserializationSchema<RowData> innerSchema =
+                innerDecodingFormat.createRuntimeDecoder(context, physicalDataType);
+        if (innerSchema instanceof CsvRowDataDeserializationSchema && ignoreTrailingUnmappable) {
+            this.makeCsvInnerFormatIgnoreTrailingUnmappable(innerSchema);
+        }
+
         return new InLongMsgDeserializationSchema(
-                innerDecodingFormat.createRuntimeDecoder(context, physicalDataType),
+                innerSchema,
                 metadataConverters,
                 producedTypeInfo,
                 ignoreErrors);
@@ -190,4 +209,25 @@ public Object read(InLongMsgHead head) {
             this.converter = converter;
         }
     }
+
+
+    private void makeCsvInnerFormatIgnoreTrailingUnmappable(DeserializationSchema<RowData> innerSchema) {
+        try {
+            Field readerField = CsvRowDataDeserializationSchema.class.getDeclaredField("objectReader");
+            readerField.setAccessible(true);
+            ObjectReader oldReader = (ObjectReader) readerField.get(innerSchema);
+
+            Field schemaField = ObjectReader.class.getDeclaredField("_schema");
+            schemaField.setAccessible(true);
+            CsvSchema oldSchema = (CsvSchema) schemaField.get(oldReader);
+
+            ObjectReader newReader = new CsvMapper()
+                    .enable(CsvParser.Feature.IGNORE_TRAILING_UNMAPPABLE)
+                    .readerFor(JsonNode.class)
+                    .with(oldSchema);
+            readerField.set(innerSchema, newReader);
+        } catch (Throwable t) {
+            log.error("failed to make csv inner format to ignore trailing unmappable, ex is ", t);
+        }
+    }
 }
diff --git a/inlong-sort/sort-formats/format-inlongmsg-base/src/main/java/org/apache/inlong/sort/formats/inlongmsg/InLongMsgFormatFactory.java b/inlong-sort/sort-formats/format-inlongmsg-base/src/main/java/org/apache/inlong/sort/formats/inlongmsg/InLongMsgFormatFactory.java
index c9b368a3645..4703d29803f 100644
--- a/inlong-sort/sort-formats/format-inlongmsg-base/src/main/java/org/apache/inlong/sort/formats/inlongmsg/InLongMsgFormatFactory.java
+++ b/inlong-sort/sort-formats/format-inlongmsg-base/src/main/java/org/apache/inlong/sort/formats/inlongmsg/InLongMsgFormatFactory.java
@@ -35,6 +35,7 @@
 import java.util.Set;
 
 import static org.apache.inlong.sort.formats.inlongmsg.InLongMsgOptions.IGNORE_PARSE_ERRORS;
+import static org.apache.inlong.sort.formats.inlongmsg.InLongMsgOptions.IGNORE_TRAILING_UNMAPPABLE;
 import static org.apache.inlong.sort.formats.inlongmsg.InLongMsgOptions.INNER_FORMAT;
 import static org.apache.inlong.sort.formats.inlongmsg.InLongMsgOptions.validateDecodingFormatOptions;
 
@@ -65,8 +66,8 @@ public DecodingFormat<DeserializationSchema<RowData>> createDecodingFormat(Conte
         DecodingFormat<DeserializationSchema<RowData>> innerFormat =
                 innerFactory.createDecodingFormat(context, new DelegatingConfiguration(allOptions, innerFormatPrefix));
         boolean ignoreErrors = formatOptions.get(IGNORE_PARSE_ERRORS);
-
-        return new InLongMsgDecodingFormat(innerFormat, innerFormatMetaPrefix, ignoreErrors);
+        boolean ignoreTrailingUnmappable = formatOptions.get(IGNORE_TRAILING_UNMAPPABLE);
+        return new InLongMsgDecodingFormat(innerFormat, innerFormatMetaPrefix, ignoreErrors, ignoreTrailingUnmappable);
     }
 
     @Override
diff --git a/inlong-sort/sort-formats/format-inlongmsg-base/src/main/java/org/apache/inlong/sort/formats/inlongmsg/InLongMsgOptions.java b/inlong-sort/sort-formats/format-inlongmsg-base/src/main/java/org/apache/inlong/sort/formats/inlongmsg/InLongMsgOptions.java
index 92a2ebc0b78..7e1d33b3fa0 100644
--- a/inlong-sort/sort-formats/format-inlongmsg-base/src/main/java/org/apache/inlong/sort/formats/inlongmsg/InLongMsgOptions.java
+++ b/inlong-sort/sort-formats/format-inlongmsg-base/src/main/java/org/apache/inlong/sort/formats/inlongmsg/InLongMsgOptions.java
@@ -41,6 +41,13 @@ private InLongMsgOptions() {
                     .withDescription("Optional flag to skip fields and rows with parse errors instead of failing;\n"
                             + "fields are set to null in case of errors");
 
+    public static final ConfigOption<Boolean> IGNORE_TRAILING_UNMAPPABLE =
+            ConfigOptions.key("ignore-trailing-unmappable")
+                    .booleanType()
+                    .defaultValue(true)
+                    .withDescription("Allows the case that real size exceeds the expected size.\n "
+                            + "The extra column will be skipped");
+
     public static void validateDecodingFormatOptions(ReadableConfig config) {
         String innerFormat = config.get(INNER_FORMAT);
         if (innerFormat == null) {