diff --git a/nezha-fronted/src/assets/css/components/page/notebook/notebook.scss b/nezha-fronted/src/assets/css/components/page/notebook/notebook.scss
index 603dd15f8..7f6685928 100644
--- a/nezha-fronted/src/assets/css/components/page/notebook/notebook.scss
+++ b/nezha-fronted/src/assets/css/components/page/notebook/notebook.scss
@@ -210,6 +210,7 @@
         z-index: 0;
         pointer-events: none;
         white-space: pre-wrap;
+        font-size: 14px;
         color: $--input-placeholder-color;
         font-family: menlo,Ubuntu Mono,consolas,Courier New,Microsoft Yahei,Hiragino Sans GB,WenQuanYi Micro Hei,sans-serif !important;
       }