diff --git a/nezha-fronted/src/components/charts/chartDataFormat.js b/nezha-fronted/src/components/charts/chartDataFormat.js
index b819b93d6..d6305545f 100644
--- a/nezha-fronted/src/components/charts/chartDataFormat.js
+++ b/nezha-fronted/src/components/charts/chartDataFormat.js
@@ -317,7 +317,7 @@ function timeCompute(value,unit,dot=0){
         }
         let quotient = time / minUnit.ascii;
         if(quotient < 1){
-          return `${time.toFixed(dot)} ${minUnit.unit}`;
+          return `${Number(time).toFixed(dot)} ${minUnit.unit}`;
         }else{
           minUnit = units[++i];
           return result(quotient,minUnit);