diff --git a/src/typespec-aaz/src/convertor.ts b/src/typespec-aaz/src/convertor.ts
index f49cda13..b7200322 100644
--- a/src/typespec-aaz/src/convertor.ts
+++ b/src/typespec-aaz/src/convertor.ts
@@ -55,6 +55,7 @@ import {
   isVoidType,
   resolveEncodedName,
   IntrinsicType,
+  serializeValueAsJson,
 } from "@typespec/compiler";
 import { TwoLevelMap } from "@typespec/compiler/utils";
 import {
@@ -699,7 +700,7 @@ function convert2CMDSchema(
 
     if (param.defaultValue) {
       schema.default = {
-        value: getDefaultValue(context, param.defaultValue),
+        value: getDefaultValue(context, param.defaultValue, param),
       };
     }
   }
@@ -708,6 +709,10 @@ function convert2CMDSchema(
       ...schema,
       ...applySchemaFormat(context, param, schema as CMDSchemaBase),
     };
+    schema = {
+      ...schema,
+      ...applyEncoding(context, param, schema),
+    };
     schema = {
       ...schema,
       ...applyExtensionsDecorators(context, param, schema),
@@ -759,6 +764,7 @@ function convert2CMDSchemaBase(context: AAZSchemaEmitterContext, type: Type): CM
   }
   if (schema) {
     schema = applySchemaFormat(context, type, schema);
+    schema = applyEncoding(context, type, schema);
     schema = applyExtensionsDecorators(context, type, schema);
   }
 
@@ -1898,6 +1904,20 @@ function emitArrayFormat(
 
 // TODO: add emitResourceIdFormat
 
+function applyEncoding(context: AAZSchemaEmitterContext, type: Type, schema: CMDSchemaBase): CMDSchemaBase {
+  if (type.kind !== "Scalar" && type.kind !== "ModelProperty") {
+    return schema;
+  }
+  const encodeData = getEncode(context.program, type);
+  if (encodeData !== undefined) {
+    schema = {
+      ...schema,
+      ...convertScalar2CMDSchemaBase(context, encodeData.type),
+    };
+  }
+  return schema;
+}
+
 // apply extension decorators
 function applyExtensionsDecorators(context: AAZSchemaEmitterContext, type: Type, schema: CMDSchemaBase): CMDSchemaBase {
   const extensions = getExtensions(context.program, type);
@@ -2124,25 +2144,6 @@ function getClsDefinitionModel(schema: CMDClsSchemaBase): CMDObjectSchemaBase |
   return schema.type.pendingSchema.schema!;
 }
 
-function getDefaultValue(content: AAZSchemaEmitterContext, defaultType: Value): unknown {
-  switch (defaultType.valueKind) {
-    case "StringValue":
-      return defaultType.value;
-    case "NumericValue":
-      return defaultType.value.asNumber() ?? undefined;
-    case "BooleanValue":
-      return defaultType.value;
-    case "ArrayValue":
-      return defaultType.values.map((x) => getDefaultValue(content, x));
-    case "NullValue":
-      return null;
-    case "EnumValue":
-      return defaultType.value.value ?? defaultType.value.name;
-    default:
-      reportDiagnostic(content.program, {
-        code: "invalid-default",
-        format: { type: defaultType.valueKind },
-        target: defaultType,
-      });
-  }
+function getDefaultValue(context: AAZSchemaEmitterContext, defaultType: Value, modelProperty: ModelProperty): any {
+  return serializeValueAsJson(context.program, defaultType, modelProperty);
 }
diff --git a/src/typespec-aaz/test/encoding.test.ts b/src/typespec-aaz/test/encoding.test.ts
new file mode 100644
index 00000000..da40899e
--- /dev/null
+++ b/src/typespec-aaz/test/encoding.test.ts
@@ -0,0 +1,44 @@
+import { TestHost, BasicTestRunner } from "@typespec/compiler/testing";
+import { describe, expect, it, beforeEach } from "vitest";
+import { createTypespecAazTestHost, createTypespecAazTestRunner, compileTypespecAAZOperations } from "./test-aaz.js";
+import { ModelVar, generateCompileArmResourceTemplate, findObjectsWithKey } from "./util.js";
+
+describe("encoding parsing", () => {
+  let host: TestHost;
+  let runner: BasicTestRunner;
+
+  beforeEach(async () => {
+    host = await createTypespecAazTestHost();
+    runner = await createTypespecAazTestRunner(host);
+  });
+
+  it("validate encoding duration with default", async () => {
+    const modelTmp: ModelVar = {
+      modelKey: "targetValue",
+      modelContent: "TargetEncodingModel",
+      isComposite: true,
+      appendModel: `
+      model TargetEncodingModel {
+        @encode(DurationKnownEncoding.seconds, int32)
+        errorRateTimeWindowInSeconds?: duration = duration.fromISO("PT60S");
+      }
+      `,
+    };
+
+    const code: string = generateCompileArmResourceTemplate(modelTmp);
+    const result = await compileTypespecAAZOperations(
+      code,
+      {
+        "operation": "get-resources-operations",
+        "api-version": "A",
+        "resources": ["/subscriptions/{}/resourcegroups/{}/providers/microsoft.mock/mockresources/{}"],
+      },
+      runner,
+    );
+    const resultObj = JSON.parse(result!);
+    expect(Array.isArray(resultObj)).toBe(true);
+    expect(resultObj.length).toBe(1);
+    const targetObj = findObjectsWithKey(resultObj[0].pathItem.get.read.http.responses, "targetValue");
+    await expect(JSON.stringify(targetObj, null, 2)).toMatchFileSnapshot("./snapshots/encoding-duration-prop.json");
+  });
+});
diff --git a/src/typespec-aaz/test/snapshots/encoding-duration-prop.json b/src/typespec-aaz/test/snapshots/encoding-duration-prop.json
new file mode 100644
index 00000000..fe26afa2
--- /dev/null
+++ b/src/typespec-aaz/test/snapshots/encoding-duration-prop.json
@@ -0,0 +1,14 @@
+{
+  "type": "object",
+  "props": [
+    {
+      "type": "integer32",
+      "name": "errorRateTimeWindowInSeconds",
+      "default": {
+        "value": 60
+      }
+    }
+  ],
+  "name": "targetValue",
+  "required": true
+}
\ No newline at end of file