diff --git a/suites-help/示例代码/缓冲区分析.md b/suites-help/示例代码/缓冲区分析.md
index 92c2a66..937944e 100644
--- a/suites-help/示例代码/缓冲区分析.md
+++ b/suites-help/示例代码/缓冲区分析.md
@@ -28,7 +28,7 @@ steps:
     name: 全流水线
     script_id: process
     params:
-      buffer_distance: buffer_distance
+      buffer_distance: $params.buffer_distance
 
 resolved_params:
   - step_index: 0