diff --git a/src/stocks/base/index.ts b/src/stocks/base/index.ts
index 6051d63..a137739 100644
--- a/src/stocks/base/index.ts
+++ b/src/stocks/base/index.ts
@@ -1,10 +1,11 @@
 // Types
 import Stock from "types/utils/stock";
+import StockApi from "types/stocks/index";
 
 /**
  * 基础股票代码接口
  */
-class Base {
+class Base implements StockApi {
   /**
    * 构造函数
    */
diff --git a/src/stocks/base/transforms/exchange.ts b/src/stocks/base/transforms/api-code.ts
similarity index 69%
rename from src/stocks/base/transforms/exchange.ts
rename to src/stocks/base/transforms/api-code.ts
index 2d4bb03..1ff330a 100644
--- a/src/stocks/base/transforms/exchange.ts
+++ b/src/stocks/base/transforms/api-code.ts
@@ -2,12 +2,12 @@
 import { SZ, SH, HK, US } from "@utils/constant";
 
 // Types
-import ExchangeTransform from "types/stocks/transforms/exchange";
+import ApiCodeTransform from "types/stocks/transforms/api-code";
 
 /**
  * 基础股票代码转换
  */
-class BaseExchangeTransform implements ExchangeTransform {
+class BaseApiCodeTransform implements ApiCodeTransform {
   /**
    * 构造函数
    */
@@ -19,19 +19,19 @@ class BaseExchangeTransform implements ExchangeTransform {
    */
   public transform(code: string): string {
     if (code.includes(SH)) {
-      return this.SHExchangeTransform(code);
+      return this.SHTransform(code);
     }
 
     if (code.includes(SZ)) {
-      return this.SZExchangeTransform(code);
+      return this.SZTransform(code);
     }
 
     if (code.includes(HK)) {
-      return this.HKExchangeTransform(code);
+      return this.HKTransform(code);
     }
 
-    if (code.search(US) !== -1) {
-      return this.USExchangeTransform(code);
+    if (code.includes(US)) {
+      return this.USTransform(code);
     }
 
     throw new Error("请检查股票代码是否正确");
@@ -49,7 +49,7 @@ class BaseExchangeTransform implements ExchangeTransform {
    * 深交所股票代码转换
    * @param code 股票代码
    */
-  public SZExchangeTransform(code: string): string {
+  public SZTransform(code: string): string {
     if (!code.includes(SZ)) {
       throw new Error("请检查股票代码是否正确");
     }
@@ -61,7 +61,7 @@ class BaseExchangeTransform implements ExchangeTransform {
    * 上交所股票代码转换
    * @param code 股票代码
    */
-  public SHExchangeTransform(code: string): string {
+  public SHTransform(code: string): string {
     if (!code.includes(SH)) {
       throw new Error("请检查股票代码是否正确");
     }
@@ -73,7 +73,7 @@ class BaseExchangeTransform implements ExchangeTransform {
    * 港交所股票代码转换
    * @param code 股票代码
    */
-  public HKExchangeTransform(code: string): string {
+  public HKTransform(code: string): string {
     if (!code.includes(HK)) {
       throw new Error("请检查股票代码是否正确");
     }
@@ -85,7 +85,7 @@ class BaseExchangeTransform implements ExchangeTransform {
    * 美交所股票代码转换
    * @param code 股票代码
    */
-  public USExchangeTransform(code: string): string {
+  public USTransform(code: string): string {
     if (!code.includes(US)) {
       throw new Error("请检查股票代码是否正确");
     }
@@ -94,4 +94,4 @@ class BaseExchangeTransform implements ExchangeTransform {
   }
 }
 
-export default BaseExchangeTransform;
+export default BaseApiCodeTransform;
diff --git a/src/stocks/base/transforms/local-code.ts b/src/stocks/base/transforms/local-code.ts
new file mode 100644
index 0000000..f9b0b6b
--- /dev/null
+++ b/src/stocks/base/transforms/local-code.ts
@@ -0,0 +1,62 @@
+// Types
+import LocalCodeTransform from "types/stocks/transforms/local-code";
+
+/**
+ * 基础股票代码转换统一码
+ */
+class BaseLocalCodeTransform implements LocalCodeTransform {
+  /**
+   * 构造函数
+   */
+  constructor() { }
+
+  /**
+   * 交易所股票代码转换统一码
+   * @param code 股票代码
+   */
+  public transform(code: string): string {
+    throw new Error("未实现股票代码转换统一码");
+  }
+
+  /**
+   * 交易所股票组代码转换统一码
+   * @param codes 股票代码
+   */
+  public transforms(codes: string[]): string[] {
+    return codes.map((code) => this.transform(code));
+  }
+
+  /**
+   * 深交所股票代码转换统一码
+   * @param code 股票代码
+   */
+  public SZTransform(code: string): string {
+    throw new Error("未实现深交所股票代码转换统一码");
+  }
+
+  /**
+   * 上交所股票代码转换统一码
+   * @param code 股票代码
+   */
+  public SHTransform(code: string): string {
+    throw new Error("未实现上交所股票代码转换统一码");
+  }
+
+  /**
+   * 港交所股票代码转换统一码
+   * @param code 股票代码
+   */
+  public HKTransform(code: string): string {
+    throw new Error("未实现港交所股票代码转换统一码");
+  }
+
+  /**
+   * 美交所股票代码转换统一码
+   * @param code 股票代码
+   */
+  public USTransform(code: string): string {
+    throw new Error("未实现美交所股票代码转换统一码");
+  }
+}
+
+export default BaseLocalCodeTransform;
diff --git a/test/stocks/base/transforms/exchange.test.ts b/test/stocks/base/transforms/api-code.test.ts
similarity index 53%
rename from test/stocks/base/transforms/exchange.test.ts
rename to test/stocks/base/transforms/api-code.test.ts
index 599d566..b5fe0b1 100644
--- a/test/stocks/base/transforms/exchange.test.ts
+++ b/test/stocks/base/transforms/api-code.test.ts
@@ -1,71 +1,70 @@
 // Stock
-const BaseExchangeTransform = require("stocks/base/transforms/exchange").default;
+const BaseApiCodeTransform = require("stocks/base/transforms/api-code").default;
 
 describe("【基础】股票代码转换测试", () => {
   it("深交所股票代码转换", async () => {
-    expect(() => (new BaseExchangeTransform()).SZExchangeTransform("000000"))
+    expect(() => (new BaseApiCodeTransform()).SZTransform("000000"))
       .toThrow(new Error("请检查股票代码是否正确"));
 
-    expect(() => (new BaseExchangeTransform()).SZExchangeTransform("SZ000000"))
+    expect(() => (new BaseApiCodeTransform()).SZTransform("SZ000000"))
       .toThrow(new Error("未实现深交所股票代码转换"));
   });
 
   it("上交所股票代码转换", async () => {
-    expect(() => (new BaseExchangeTransform()).SHExchangeTransform("000000"))
+    expect(() => (new BaseApiCodeTransform()).SHTransform("000000"))
       .toThrow(new Error("请检查股票代码是否正确"));
 
-    expect(() => (new BaseExchangeTransform())
-      .SHExchangeTransform("SH000000"))
+    expect(() => (new BaseApiCodeTransform()).SHTransform("SH000000"))
       .toThrow(new Error("未实现上交所股票代码转换"));
   });
 
   it("港交所股票代码转换", async () => {
-    expect(() => new BaseExchangeTransform().HKExchangeTransform("000000"))
+    expect(() => new BaseApiCodeTransform().HKTransform("000000"))
       .toThrow(new Error("请检查股票代码是否正确"));
 
-    expect(() => new BaseExchangeTransform().HKExchangeTransform("HK000000"))
+    expect(() => new BaseApiCodeTransform().HKTransform("HK000000"))
       .toThrow(new Error("未实现港交所股票代码转换"));
   });
 
   it("美交所股票代码转换", async () => {
-    expect(() => (new BaseExchangeTransform()).USExchangeTransform("000000"))
+    expect(() => (new BaseApiCodeTransform()).USTransform("000000"))
       .toThrow(new Error("请检查股票代码是否正确"));
 
-    expect(() => (new BaseExchangeTransform()).USExchangeTransform("US000000"))
+    expect(() => (new BaseApiCodeTransform()).USTransform("US000000"))
       .toThrow(new Error("未实现美交所股票代码转换"));
   });
 
   it("交易所股票代码转换", async () => {
-    expect(() => (new BaseExchangeTransform()).transform("000000"))
+    expect(() => (new BaseApiCodeTransform()).transform("000000"))
       .toThrow(new Error("请检查股票代码是否正确"));
 
-    expect(() => (new BaseExchangeTransform()).transform("SZ000000"))
+    expect(() => (new BaseApiCodeTransform()).transform("SZ000000"))
       .toThrow(new Error("未实现深交所股票代码转换"));
 
-    expect(() => (new BaseExchangeTransform()).transform("SH000000"))
+    expect(() => (new BaseApiCodeTransform()).transform("SH000000"))
       .toThrow(new Error("未实现上交所股票代码转换"));
 
-    expect(() => (new BaseExchangeTransform()).transform("HK000000"))
+    expect(() => (new BaseApiCodeTransform()).transform("HK000000"))
       .toThrow(new Error("未实现港交所股票代码转换"));
 
-    expect(() => (new BaseExchangeTransform()).transform("US000000"))
+    expect(() => (new BaseApiCodeTransform()).transform("US000000"))
       .toThrow(new Error("未实现美交所股票代码转换"));
   });
 
   it("交易所股票组代码转换", async () => {
-    expect(() => (new BaseExchangeTransform()).transforms(["000000"]))
+    expect(() => (new BaseApiCodeTransform()).transforms(["000000"]))
       .toThrow(new Error("请检查股票代码是否正确"));
 
-    expect(() => (new BaseExchangeTransform()).transforms(["SZ000000"]))
+    expect(() => (new BaseApiCodeTransform()).transforms(["SZ000000"]))
       .toThrow(new Error("未实现深交所股票代码转换"));
 
-    expect(() => (new BaseExchangeTransform()).transforms(["SH000000"]))
+    expect(() => (new BaseApiCodeTransform()).transforms(["SH000000"]))
       .toThrow(new Error("未实现上交所股票代码转换"));
 
-    expect(() => (new BaseExchangeTransform()).transforms(["HK000000"]))
+    expect(() => (new BaseApiCodeTransform()).transforms(["HK000000"]))
       .toThrow(new Error("未实现港交所股票代码转换"));
 
-    expect(() => (new BaseExchangeTransform()).transforms(["US000000"]))
+    expect(() => (new BaseApiCodeTransform()).transforms(["US000000"]))
       .toThrow(new Error("未实现美交所股票代码转换"));
   });
 });
diff --git a/types/stocks/index.d.ts b/types/stocks/index.d.ts
index d820187..781fe44 100644
--- a/types/stocks/index.d.ts
+++ b/types/stocks/index.d.ts
@@ -1,11 +1,6 @@
 import Stock from '../utils/stock';
 
-export interface StockApi {
-  /**
-   * 构造函数
-   */
-  new(): StockApi;
-
+declare class StockApi {
   /**
    * 构造函数
    */
diff --git a/types/stocks/transforms/api-code.d.ts b/types/stocks/transforms/api-code.d.ts
new file mode 100644
index 0000000..ca91e8d
--- /dev/null
+++ b/types/stocks/transforms/api-code.d.ts
@@ -0,0 +1,10 @@
+export interface ApiCodeTransform {
+  transform(code: string): string;
+  transforms(codes: string[]): string[];
+  SZTransform(code: string): string;
+  SHTransform(code: string): string;
+  HKTransform(code: string): string;
+  USTransform(code: string): string;
+}
+
+export default ApiCodeTransform;
diff --git a/types/stocks/transforms/exchange.d.ts b/types/stocks/transforms/exchange.d.ts
deleted file mode 100644
index 0420b91..0000000
--- a/types/stocks/transforms/exchange.d.ts
+++ /dev/null
@@ -1,10 +0,0 @@
-export interface ExchangeTransform {
-  transform(code: string): string;
-  transforms(codes: string[]): string[];
-  SZExchangeTransform(code: string): string;
-  SHExchangeTransform(code: string): string;
-  HKExchangeTransform(code: string): string;
-  USExchangeTransform(code: string): string;
-}
-
-export default ExchangeTransform;
diff --git a/types/stocks/transforms/local-code.d.ts b/types/stocks/transforms/local-code.d.ts
new file mode 100644
index 0000000..c8d87d6
--- /dev/null
+++ b/types/stocks/transforms/local-code.d.ts
@@ -0,0 +1,10 @@
+export interface LocalCodeTransform {
+  transform(code: string): string;
+  transforms(codes: string[]): string[];
+  SZTransform(code: string): string;
+  SHTransform(code: string): string;
+  HKTransform(code: string): string;
+  USTransform(code: string): string;
+}
+
+export default LocalCodeTransform;