diff --git a/inlong-sdk/transform-sdk/src/main/java/org/apache/inlong/sdk/transform/process/function/SplitIndexFunction.java b/inlong-sdk/transform-sdk/src/main/java/org/apache/inlong/sdk/transform/process/function/SplitIndexFunction.java
new file mode 100644
index 00000000000..d45706bee01
--- /dev/null
+++ b/inlong-sdk/transform-sdk/src/main/java/org/apache/inlong/sdk/transform/process/function/SplitIndexFunction.java
@@ -0,0 +1,78 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.inlong.sdk.transform.process.function;
+
+import org.apache.inlong.sdk.transform.decode.SourceData;
+import org.apache.inlong.sdk.transform.process.Context;
+import org.apache.inlong.sdk.transform.process.operator.OperatorTools;
+import org.apache.inlong.sdk.transform.process.parser.ValueParser;
+
+import net.sf.jsqlparser.expression.Expression;
+import net.sf.jsqlparser.expression.Function;
+
+import java.util.List;
+/*
+ * SplitIndexFunction
+ *
+ * Description:
+ * Split_index(string1, string2, integer) -> string
+ * Splits string1 by delimiter string2 and returns the string at the given index integer(zero-based).
+ * - Returns null if the index is negative or any of the arguments is null.
+ * - Returns null if the index is out of bounds of the split strings.
+ *
+ */
+@TransformFunction(names = {"split_index", "splitindex"})
+public class SplitIndexFunction implements ValueParser {
+
+    private final ValueParser strParser;
+    private final ValueParser delimiterParser;
+    private final ValueParser indexParser;
+
+    public SplitIndexFunction(Function expr) {
+        List<Expression> expressions = expr.getParameters().getExpressions();
+        strParser = OperatorTools.buildParser(expressions.get(0));
+        delimiterParser = OperatorTools.buildParser(expressions.get(1));
+        indexParser = OperatorTools.buildParser(expressions.get(2));
+    }
+
+    @Override
+    public Object parse(SourceData sourceData, int rowIndex, Context context) {
+        Object strObject = strParser.parse(sourceData, rowIndex, context);
+        Object delimiterObject = delimiterParser.parse(sourceData, rowIndex, context);
+        Object indexObject = indexParser.parse(sourceData, rowIndex, context);
+
+        if (strObject == null || delimiterObject == null || indexObject == null) {
+            return null;
+        }
+
+        String str = OperatorTools.parseString(strObject);
+        String delimiter = OperatorTools.parseString(delimiterObject);
+        int index = OperatorTools.parseBigDecimal(indexObject).intValue();
+
+        if (str == null || delimiter == null || index < 0) {
+            return null;
+        }
+
+        String[] splitStrings = str.split(delimiter);
+        if (index >= splitStrings.length) {
+            return null;
+        }
+
+        return splitStrings[index];
+    }
+}
\ No newline at end of file
diff --git a/inlong-sdk/transform-sdk/src/test/java/org/apache/inlong/sdk/transform/process/function/string/TestSplitIndexFunction.java b/inlong-sdk/transform-sdk/src/test/java/org/apache/inlong/sdk/transform/process/function/string/TestSplitIndexFunction.java
new file mode 100644
index 00000000000..1ad949aaa44
--- /dev/null
+++ b/inlong-sdk/transform-sdk/src/test/java/org/apache/inlong/sdk/transform/process/function/string/TestSplitIndexFunction.java
@@ -0,0 +1,103 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.inlong.sdk.transform.process.function.string;
+
+import org.apache.inlong.sdk.transform.decode.SourceDecoderFactory;
+import org.apache.inlong.sdk.transform.encode.SinkEncoderFactory;
+import org.apache.inlong.sdk.transform.pojo.TransformConfig;
+import org.apache.inlong.sdk.transform.process.TransformProcessor;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+import java.util.HashMap;
+import java.util.List;
+
+public class TestSplitIndexFunction extends AbstractFunctionStringTestBase {
+
+    @Test
+    public void testSplitIndexFunction() throws Exception {
+        String transformSql = "select split_index(string1, string2, numeric1) from source";
+        TransformConfig config = new TransformConfig(transformSql);
+        TransformProcessor<String, String> processor = TransformProcessor
+                .create(config, SourceDecoderFactory.createCsvDecoder(csvSource),
+                        SinkEncoderFactory.createKvEncoder(kvSink));
+
+        // case1: split_index('a,b,c', ',', 1)
+        String data = "a,b,c|,|cloud|1|3|3";
+        List<String> output = processor.transform(data, new HashMap<>());
+        Assert.assertEquals(1, output.size());
+        Assert.assertEquals("result=b", output.get(0));
+
+        // case2: split_index('a,b,c', ',', -1)
+        data = "a,b,c|,|cloud|-1|3|3";
+        output = processor.transform(data, new HashMap<>());
+        Assert.assertEquals(1, output.size());
+        Assert.assertEquals("result=null", output.get(0));
+
+        // case3: split_index('a,b,c', ',', 3)
+        data = "a,b,c|,|cloud|3|3|3";
+        output = processor.transform(data, new HashMap<>());
+        Assert.assertEquals(1, output.size());
+        Assert.assertEquals("result=null", output.get(0));
+
+        // case4: split_index(null, ',', 1)
+        transformSql = "select split_index(xxd, string2, numeric1) from source";
+        config = new TransformConfig(transformSql);
+        processor = TransformProcessor
+                .create(config, SourceDecoderFactory.createCsvDecoder(csvSource),
+                        SinkEncoderFactory.createKvEncoder(kvSink));
+        data = "abc|,|cloud|1|3|3";
+        output = processor.transform(data, new HashMap<>());
+        Assert.assertEquals(1, output.size());
+        Assert.assertEquals("result=null", output.get(0));
+
+        // case5: split_index('a,b,c', null, 1)
+        transformSql = "select split_index(string1, xxd, numeric1) from source";
+        config = new TransformConfig(transformSql);
+        processor = TransformProcessor
+                .create(config, SourceDecoderFactory.createCsvDecoder(csvSource),
+                        SinkEncoderFactory.createKvEncoder(kvSink));
+        data = "a,b,c|xxd|cloud|1|3|3";
+        output = processor.transform(data, new HashMap<>());
+        Assert.assertEquals(1, output.size());
+        Assert.assertEquals("result=null", output.get(0));
+
+        // case6: split_index('a,b,c', ',', null)
+        transformSql = "select split_index(string1, string2, xxd) from source";
+        config = new TransformConfig(transformSql);
+        processor = TransformProcessor
+                .create(config, SourceDecoderFactory.createCsvDecoder(csvSource),
+                        SinkEncoderFactory.createKvEncoder(kvSink));
+        data = "a,b,c|,|cloud|xxd|3|3";
+        output = processor.transform(data, new HashMap<>());
+        Assert.assertEquals(1, output.size());
+        Assert.assertEquals("result=null", output.get(0));
+
+        // case7: split_index('', ',', 0)
+        transformSql = "select split_index(string1, string2, numeric1) from source";
+        config = new TransformConfig(transformSql);
+        processor = TransformProcessor
+                .create(config, SourceDecoderFactory.createCsvDecoder(csvSource),
+                        SinkEncoderFactory.createKvEncoder(kvSink));
+        data = "|,|cloud|0|3|3";
+        output = processor.transform(data, new HashMap<>());
+        Assert.assertEquals(1, output.size());
+        Assert.assertEquals("result=", output.get(0));
+    }
+}
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