diff --git a/src-tauri/Cargo.lock b/src-tauri/Cargo.lock
index 9315a36..68bb71d 100644
--- a/src-tauri/Cargo.lock
+++ b/src-tauri/Cargo.lock
@@ -562,6 +562,7 @@ dependencies = [
  "tauri-build",
  "tauri-plugin-log",
  "tauri-plugin-opener",
+ "toml 0.8.2",
 ]
 
 [[package]]
diff --git a/src-tauri/Cargo.toml b/src-tauri/Cargo.toml
index ffe61c2..dcf7bb0 100644
--- a/src-tauri/Cargo.toml
+++ b/src-tauri/Cargo.toml
@@ -25,6 +25,7 @@ tauri = { version = "2.8.2", features = [] }
 tauri-plugin-log = "2"
 tauri-plugin-opener = "2"
 dirs = "5.0"
+toml = "0.8"
 
 [target.'cfg(target_os = "macos")'.dependencies]
 objc2 = "0.5"
diff --git a/src-tauri/src/codex_config.rs b/src-tauri/src/codex_config.rs
index 7028b64..f3cb151 100644
--- a/src-tauri/src/codex_config.rs
+++ b/src-tauri/src/codex_config.rs
@@ -74,6 +74,11 @@ pub fn save_codex_provider_config(
     // 保存 config.toml
     if let Some(config) = settings_config.get("config") {
         if let Some(config_str) = config.as_str() {
+            // 若非空则进行 TOML 语法校验
+            if !config_str.trim().is_empty() {
+                toml::from_str::<toml::Table>(config_str)
+                    .map_err(|e| format!("config.toml 格式错误: {}", e))?;
+            }
             fs::write(&config_path, config_str)
                 .map_err(|e| format!("写入供应商 config.toml 失败: {}", e))?;
         }
@@ -143,8 +148,13 @@ pub fn import_current_codex_config() -> Result<Value, String> {
 
     // 读取 config.toml（允许不存在或读取失败时为空）
     let config_str = if config_path.exists() {
-        fs::read_to_string(&config_path)
-            .map_err(|e| format!("读取 config.toml 失败: {}", e))?
+        let s = fs::read_to_string(&config_path)
+            .map_err(|e| format!("读取 config.toml 失败: {}", e))?;
+        if !s.trim().is_empty() {
+            toml::from_str::<toml::Table>(&s)
+                .map_err(|e| format!("config.toml 语法错误: {}", e))?;
+        }
+        s
     } else {
         String::new()
     };