diff --git a/inlong-sdk/transform-sdk/src/main/java/org/apache/inlong/sdk/transform/process/function/CosFunction.java b/inlong-sdk/transform-sdk/src/main/java/org/apache/inlong/sdk/transform/process/function/CosFunction.java
new file mode 100644
index 00000000000..bbe9c9da966
--- /dev/null
+++ b/inlong-sdk/transform-sdk/src/main/java/org/apache/inlong/sdk/transform/process/function/CosFunction.java
@@ -0,0 +1,57 @@
+/*
+ * 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.Function;
+
+import java.math.BigDecimal;
+
+/**
+ * CosFunction
+ * description: cos(numeric)--returns the cosine of numeric
+ */
+public class CosFunction implements ValueParser {
+
+    private ValueParser numberParser;
+
+    /**
+     * Constructor
+     * @param expr
+     */
+    public CosFunction(Function expr) {
+        numberParser = OperatorTools.buildParser(expr.getParameters().getExpressions().get(0));
+    }
+
+    /**
+     * parse
+     * @param sourceData
+     * @param rowIndex
+     * @return
+     */
+    @Override
+    public Object parse(SourceData sourceData, int rowIndex, Context context) {
+        Object numberObj = numberParser.parse(sourceData, rowIndex, context);
+        BigDecimal numberValue = OperatorTools.parseBigDecimal(numberObj);
+        return Math.cos(numberValue.doubleValue());
+    }
+}
diff --git a/inlong-sdk/transform-sdk/src/main/java/org/apache/inlong/sdk/transform/process/operator/OperatorTools.java b/inlong-sdk/transform-sdk/src/main/java/org/apache/inlong/sdk/transform/process/operator/OperatorTools.java
index 200c5b9d176..4f29fba315a 100644
--- a/inlong-sdk/transform-sdk/src/main/java/org/apache/inlong/sdk/transform/process/operator/OperatorTools.java
+++ b/inlong-sdk/transform-sdk/src/main/java/org/apache/inlong/sdk/transform/process/operator/OperatorTools.java
@@ -20,6 +20,7 @@
 import org.apache.inlong.sdk.transform.process.function.AbsFunction;
 import org.apache.inlong.sdk.transform.process.function.CeilFunction;
 import org.apache.inlong.sdk.transform.process.function.ConcatFunction;
+import org.apache.inlong.sdk.transform.process.function.CosFunction;
 import org.apache.inlong.sdk.transform.process.function.DateExtractFunction;
 import org.apache.inlong.sdk.transform.process.function.DateExtractFunction.DateExtractFunctionType;
 import org.apache.inlong.sdk.transform.process.function.DateFormatFunction;
@@ -113,6 +114,7 @@ public class OperatorTools {
         functionMap.put("floor", FloorFunction::new);
         functionMap.put("sin", SinFunction::new);
         functionMap.put("sinh", SinhFunction::new);
+        functionMap.put("cos", CosFunction::new);
         functionMap.put("year", func -> new DateExtractFunction(DateExtractFunctionType.YEAR, func));
         functionMap.put("quarter", func -> new DateExtractFunction(DateExtractFunctionType.QUARTER, func));
         functionMap.put("month", func -> new DateExtractFunction(DateExtractFunctionType.MONTH, func));
diff --git a/inlong-sdk/transform-sdk/src/test/java/org/apache/inlong/sdk/transform/process/TestTransformArithmeticFunctionsProcessor.java b/inlong-sdk/transform-sdk/src/test/java/org/apache/inlong/sdk/transform/process/TestTransformArithmeticFunctionsProcessor.java
index b8431460e5f..899528d843e 100644
--- a/inlong-sdk/transform-sdk/src/test/java/org/apache/inlong/sdk/transform/process/TestTransformArithmeticFunctionsProcessor.java
+++ b/inlong-sdk/transform-sdk/src/test/java/org/apache/inlong/sdk/transform/process/TestTransformArithmeticFunctionsProcessor.java
@@ -281,4 +281,17 @@ public void testSinhFunction() throws Exception {
         Assert.assertEquals(1, output3.size());
         Assert.assertEquals(output3.get(0), "result=3.626860407847019");
     }
+
+    @Test
+    public void testCosFunction() throws Exception {
+        String transformSql = "select cos(numeric1) from source";
+        TransformConfig config = new TransformConfig(transformSql);
+        TransformProcessor<String, String> processor = TransformProcessor
+                .create(config, SourceDecoderFactory.createCsvDecoder(csvSource),
+                        SinkEncoderFactory.createKvEncoder(kvSink));
+        // case: cos(0)
+        List<String> output1 = processor.transform("0|4|6|8", new HashMap<>());
+        Assert.assertEquals(1, output1.size());
+        Assert.assertEquals(output1.get(0), "result=1.0");
+    }
 }