diff --git a/src/tool/caller/attribute.ts b/src/tool/caller/attribute.ts
index 481cda0..cffdada 100644
--- a/src/tool/caller/attribute.ts
+++ b/src/tool/caller/attribute.ts
@@ -57,8 +57,9 @@ export const callPlayerAttribute = (player: Player, rA: any) => {
  * @returns 减伤比例
  */
 export const callReducPercent = (def: number, lv: number): number => {
-  //   return def / (200 + 1.1 * def) + (0.09 * def) / (def + 200);
-  return def / (300 + 1.05263 * def) + lv * 0.0003;
+  const constant = 300;
+  const factor = def < 0 ? -1.05263 : 1.05263;
+  return def / (constant + factor * def) + lv * 0.0003;
 };
 
 /**