diff --git a/Changelog.md b/Changelog.md
index 257260cad..90490c0d7 100644
--- a/Changelog.md
+++ b/Changelog.md
@@ -5,6 +5,8 @@
 
 ### 🐞 修复问题
 
+- 修复系统代理关闭后在 PAC 模式下未完全关闭
+
 ### ✨ 新增功能
 
 ### 🚀 优化改进
diff --git a/src-tauri/src/core/sysopt.rs b/src-tauri/src/core/sysopt.rs
index b0429cd06..32e42fa40 100644
--- a/src-tauri/src/core/sysopt.rs
+++ b/src-tauri/src/core/sysopt.rs
@@ -157,8 +157,9 @@ impl Sysopt {
 
         self.access_guard().write().set_guard_type(GuardType::None);
 
-        if !sys_enable && !pac_enable {
-            // disable proxy
+        // `enable_system_proxy` is the master switch.
+        // When disabled, force clear both global proxy and PAC at OS level.
+        if !sys_enable {
             sys.set_system_proxy()?;
             auto.set_auto_proxy()?;
             return Ok(());