diff --git a/.gitignore b/.gitignore
index 0b60dfa..f96ebaa 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,3 +3,5 @@ dist
 node_modules
 .vscode-test/
 *.vsix
+
+*.ignore
\ No newline at end of file
diff --git a/package.json b/package.json
index 16870d5..2dc9b44 100644
--- a/package.json
+++ b/package.json
@@ -44,6 +44,10 @@
         "command": "extension.toLowerCase",
         "title": "全小写 (Lower Case) [ foobar ]"
       },
+      {
+        "command": "extension.toCamelSnakeCase",
+        "title": "驼峰蛇形命名 (Camel Snake Case) [ Foo_Bar ]"
+      },
       {
         "command": "editor.action.transformToCamelcase",
         "title": "[VSCode 自带] 驼峰式大小写 (Camel Case) [ fooBar ]"
diff --git a/src/type-definition/support-case.ts b/src/type-definition/support-case.ts
index c458a79..92b7b64 100644
--- a/src/type-definition/support-case.ts
+++ b/src/type-definition/support-case.ts
@@ -69,4 +69,14 @@ export enum SupportCase {
      * @since 2024-04-02
      */
     LOWER_CASE,
-}
\ No newline at end of file
+
+    /**
+     * 驼峰蛇形命名
+     * Camel Snake Case
+     * e.g. Foo_Bar
+     * 
+     * @alias: camelSnakeCase / CamelSnakeCase / camel_snake_case / CAMEL_SNAKE_CASE
+     * @since 2024-04-02
+     */
+    CAMEL_SNAKE_CASE,
+}