diff --git a/Sources/Fuzzilli/CodeGen/CodeGeneratorWeights.swift b/Sources/Fuzzilli/CodeGen/CodeGeneratorWeights.swift
index 8699e2cc2b8bb16bd144dd284b1201ec9022b683..d06e80a215d1cda9a732f7b5f0a1bb97ef76ef65 100644
--- a/Sources/Fuzzilli/CodeGen/CodeGeneratorWeights.swift
+++ b/Sources/Fuzzilli/CodeGen/CodeGeneratorWeights.swift
@@ -30,6 +30,7 @@ public let codeGeneratorWeights = [
     "IntArrayGenerator":                        10,
     "TypedArrayGenerator":                      20,
     "BuiltinObjectInstanceGenerator":           10,
+    "ArkTsMapObjectInstanceGnenrator":           5,
     "ObjectBuilderFunctionGenerator":           10,
     "ObjectConstructorGenerator":               10,
     "ClassDefinitionGenerator":                 20,
diff --git a/Sources/Fuzzilli/CodeGen/CodeGenerators.swift b/Sources/Fuzzilli/CodeGen/CodeGenerators.swift
index c7d6970ac54b91175daf1862391f4a281c1566ad..3b502930d5532d13148c20bd115843efa0b6bd74 100644
--- a/Sources/Fuzzilli/CodeGen/CodeGenerators.swift
+++ b/Sources/Fuzzilli/CodeGen/CodeGenerators.swift
@@ -110,6 +110,12 @@ public let CodeGenerators: [CodeGenerator] = [
         }
     },
 
+    ValueGenerator("ArkTsMapObjectInstanceGnenrator") { b, n in
+        let builtin = "ArkTsMap"
+        let constructor = b.loadBuiltin(builtin)
+        b.construct(constructor)
+    },
+	
     ValueGenerator("TypedArrayGenerator") { b, n in
         for _ in 0..<n {
             let size = b.loadInt(b.randomSize(upTo: 0x1000))
diff --git a/Sources/Fuzzilli/Environment/JavaScriptEnvironment.swift b/Sources/Fuzzilli/Environment/JavaScriptEnvironment.swift
index 79092a3c6d7bae089668b3281ff18c96b586dc3c..6f8a0e66f45cbe3eea6408479defd33c79bb9751 100644
--- a/Sources/Fuzzilli/Environment/JavaScriptEnvironment.swift
+++ b/Sources/Fuzzilli/Environment/JavaScriptEnvironment.swift
@@ -325,6 +325,7 @@ public class JavaScriptEnvironment: ComponentBase, Environment {
         registerObjectGroup(.jsFunctions)
         registerObjectGroup(.jsSymbols)
         registerObjectGroup(.jsMaps)
+        registerObjectGroup(.collectionsMaps)
         registerObjectGroup(.jsWeakMaps)
         registerObjectGroup(.jsSets)
         registerObjectGroup(.jsWeakSets)
@@ -386,6 +387,7 @@ public class JavaScriptEnvironment: ComponentBase, Environment {
         registerBuiltin("Promise", ofType: .jsPromiseConstructor)
         registerBuiltin("Proxy", ofType: .jsProxyConstructor)
         registerBuiltin("Map", ofType: .jsMapConstructor)
+        registerBuiltin("ArkTsMap",ofType:.collectionsMapConstructor)
         registerBuiltin("WeakMap", ofType: .jsWeakMapConstructor)
         registerBuiltin("Set", ofType: .jsSetConstructor)
         registerBuiltin("WeakSet", ofType: .jsWeakSetConstructor)
@@ -557,6 +559,9 @@ public extension ILType {
     /// Type of a JavaScript Map object.
     static let jsMap = ILType.iterable + ILType.object(ofGroup: "Map", withProperties: ["size"], withMethods: ["clear", "delete", "entries", "forEach", "get", "has", "keys", "set", "values"])
 
+    /// Tpye of a ArkTS Map object
+    static let collectionsMap = JSType.iterable + JSType.object(ofGroup: "ArkTsMap", withProperties: ["size"], withMethods: ["entries", "keys", "values", "clear", "delete", "forEach", "get", "has", "set"])
+    
     /// Type of a JavaScript WeakMap object.
     static let jsWeakMap = ILType.object(ofGroup: "WeakMap", withMethods: ["delete", "get", "has", "set"])
 
@@ -653,6 +658,9 @@ public extension ILType {
     /// Type of the JavaScript Map constructor builtin.
     static let jsMapConstructor = ILType.constructor([.object()] => .jsMap)
 
+    /// Type of the ArkTs Map constructor builtin.
+    static let collectionsMapConstructor = JSType.constructor([.object()] => .collectionsMap)
+
     /// Type of the JavaScript WeakMap constructor builtin.
     static let jsWeakMapConstructor = ILType.constructor([.object()] => .jsWeakMap)
 
@@ -920,6 +928,26 @@ public extension ObjectGroup {
         ]
     )
 
+    ///ObjectGroup modelling ArkTs Map objects
+    static let collectionsMaps = ObjectGroup(
+        name: "ArkTsMap",
+        instanceType: .collectionsMap,
+        properties: [
+            "size"    : .integer
+        ],
+        methods: [
+            "entries" : [] => .object(),
+            "keys"    : [] => .object(),
+            "values"  : [] => .object(),
+            "clear"   : [] => .undefined,
+            "delete"  : [.anything] => .boolean,
+            "forEach" : [.function(), .opt(.object())] => .undefined,
+            "get"     : [.anything] => .anything,
+            "has"     : [.anything] => .boolean,
+            "set"     : [.anything, .anything] => .collectionsMap,
+        ]
+    )
+    
     /// ObjectGroup modelling JavaScript WeakMap objects
     static let jsWeakMaps = ObjectGroup(
         name: "WeakMap",