diff --git a/src/components/Echarts/renderChart.js b/src/components/Echarts/renderChart.js
index b15d08f..2c1e75d 100644
--- a/src/components/Echarts/renderChart.js
+++ b/src/components/Echarts/renderChart.js
@@ -18,7 +18,7 @@ export default function renderChart(props) {
         }
         return val;
       });
-      window.postMessage(JSON.stringify(paramsString));
+      window.postMessage(paramsString);
     });
   `
 }