diff --git a/lib/routes/pork-price/index.js b/lib/routes/pork-price/index.js
index f9bfe109d..b7d274672 100644
--- a/lib/routes/pork-price/index.js
+++ b/lib/routes/pork-price/index.js
@@ -26,7 +26,7 @@ module.exports = async (ctx) => {
         const change = (today - yesterday).toFixed(2);
         let description = `较昨日价格, 每公斤上涨${change}元`;
         if (yesterday > today) {
-            description = `较昨日价格, 下跌${change}元`;
+            description = `较昨日价格, 下跌${-change}元`;
         }
         if (yesterday === today) {
             description = '较昨日价格持平';