diff --git a/inlong-sdk/transform-sdk/src/main/java/org/apache/inlong/sdk/transform/process/function/AcosFunction.java b/inlong-sdk/transform-sdk/src/main/java/org/apache/inlong/sdk/transform/process/function/AcosFunction.java
new file mode 100644
index 00000000000..332716e57b6
--- /dev/null
+++ b/inlong-sdk/transform-sdk/src/main/java/org/apache/inlong/sdk/transform/process/function/AcosFunction.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;
+
+/**
+ * AcosFunction
+ * description: acos(numeric)--returns the arc cosine of numeric
+ */
+public class AcosFunction implements ValueParser {
+
+    private ValueParser numberParser;
+
+    /**
+     * Constructor
+     * @param expr
+     */
+    public AcosFunction(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.acos(numberValue.doubleValue());
+    }
+}
\ No newline at end of file
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 f7f023e7484..1cb1b8589ec 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
@@ -18,6 +18,7 @@
 package org.apache.inlong.sdk.transform.process.operator;
 
 import org.apache.inlong.sdk.transform.process.function.AbsFunction;
+import org.apache.inlong.sdk.transform.process.function.AcosFunction;
 import org.apache.inlong.sdk.transform.process.function.BinFunction;
 import org.apache.inlong.sdk.transform.process.function.CeilFunction;
 import org.apache.inlong.sdk.transform.process.function.ConcatFunction;
@@ -134,6 +135,7 @@ public class OperatorTools {
         functionMap.put("sin", SinFunction::new);
         functionMap.put("sinh", SinhFunction::new);
         functionMap.put("cos", CosFunction::new);
+        functionMap.put("acos", AcosFunction::new);
         functionMap.put("tan", TanFunction::new);
         functionMap.put("bin", BinFunction::new);
         functionMap.put("year", func -> new DateExtractFunction(DateExtractFunctionType.YEAR, 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 f6596cda1af..99f45bc693b 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
@@ -473,6 +473,27 @@ public void testCosFunction() throws Exception {
         Assert.assertEquals(output1.get(0), "result=1.0");
     }
 
+    @Test
+    public void testAcosFunction() throws Exception {
+        String transformSql = "select acos(numeric1) from source";
+        TransformConfig config = new TransformConfig(transformSql);
+        TransformProcessor<String, String> processor = TransformProcessor
+                .create(config, SourceDecoderFactory.createCsvDecoder(csvSource),
+                        SinkEncoderFactory.createKvEncoder(kvSink));
+        // case1: acos(1)
+        List<String> output1 = processor.transform("1|4|6|8", new HashMap<>());
+        Assert.assertEquals(1, output1.size());
+        Assert.assertEquals(output1.get(0), "result=0.0");
+        // case2: acos(0)
+        List<String> output2 = processor.transform("0|4|6|8", new HashMap<>());
+        Assert.assertEquals(1, output2.size());
+        Assert.assertEquals(output2.get(0), "result=1.5707963267948966");
+        // case3: acos(-1)
+        List<String> output3 = processor.transform("-1|4|6|8", new HashMap<>());
+        Assert.assertEquals(1, output3.size());
+        Assert.assertEquals(output3.get(0), "result=3.141592653589793");
+    }
+
     @Test
     public void testTanFunction() throws Exception {
         String transformSql = "select tan(numeric1) from source";