diff --git a/assets/script/game/hero/BuffSystem.ts b/assets/script/game/hero/BuffSystem.ts
index 5798a819..8cad3e10 100644
--- a/assets/script/game/hero/BuffSystem.ts
+++ b/assets/script/game/hero/BuffSystem.ts
@@ -34,25 +34,9 @@ export class BuffSystem extends ecs.ComblockSystem implements ecs.ISystemUpdate
         const buffComp = e.get(BuffComp);
         if (!buffComp) return;
 
-        // HeroAttrsComp 可选，用于 DoT/HoT 的血量结算和兼容字段
+        // HeroAttrsComp 可选，用于 DoT/HoT 的血量结算
         const attrsComp = e.has(HeroAttrsComp) ? e.get(HeroAttrsComp) : null;
 
-        // ---- 兼容期：递减旧字段 frost_end_time / stun_end_time ----
-        if (attrsComp) {
-            if (attrsComp.frost_end_time > 0) {
-                attrsComp.frost_end_time -= TICK_STEP;
-                if (attrsComp.frost_end_time <= 0) {
-                    attrsComp.frost_end_time = 0;
-                }
-            }
-            if (attrsComp.stun_end_time > 0) {
-                attrsComp.stun_end_time -= TICK_STEP;
-                if (attrsComp.stun_end_time <= 0) {
-                    attrsComp.stun_end_time = 0;
-                }
-            }
-        }
-
         // ---- 处理所有 buff 层 ----
         let anyChanged = false;
         buffComp.buffs.forEach((layers, buffId) => {
@@ -63,16 +47,16 @@ export class BuffSystem extends ecs.ComblockSystem implements ecs.ISystemUpdate
             for (let i = layers.length - 1; i >= 0; i--) {
                 const layer = layers[i];
 
+                // 周期效果结算（先于到期判断，避免到期帧丢失末次 tick）
+                if (cfg.tick && attrsComp) {
+                    this.processTick(layer, cfg.tick, attrsComp);
+                }
+
                 // 永久 buff（duration<=0）不递减 remaining
                 if (cfg.duration > 0) {
                     layer.remaining -= TICK_STEP;
                 }
 
-                // 周期效果结算（仅在未到期时）
-                if (cfg.tick && layer.remaining > 0 && attrsComp) {
-                    this.processTick(layer, cfg.tick, attrsComp);
-                }
-
                 // 到期移除
                 if (cfg.duration > 0 && layer.remaining <= 0) {
                     layers.splice(i, 1);