diff --git a/README.md b/README.md
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@@ -2,6 +2,7 @@
 ![](https://github.com/qiniu/goc/workflows/ut-check/badge.svg)
 ![](https://github.com/qiniu/goc/workflows/style-check/badge.svg)
 ![](https://github.com/qiniu/goc/workflows/e2e%20test/badge.svg)
+[![codecov](https://codecov.io/gh/qiniu/goc/branch/master/graph/badge.svg)](https://codecov.io/gh/qiniu/goc)
 
 A Comprehensive Coverage Testing System for The Go Programming Language
 > **Note:**