diff --git a/.gitignore b/.gitignore
index 14cb465c..380185b7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,15 +8,20 @@
 /.idea/navEditor.xml
 /.idea/assetWizardSettings.xml
 .DS_Store
-/build
 /captures
 .externalNativeBuild
 .cxx
 local.properties
 
+# DJI SDK 子模块 build 目录
+/android-sdk-v5-uxsdk/build/
+/android-sdk-v5-uxsdk/.gradle/
+/android-sdk-v5-mission/build/
 
-# 新增：DJI SDK 子模块的 build 目录（关键！）
-android-sdk-v5-uxsdk/build/
-android-sdk-v5-uxsdk/.gradle/
-android-sdk-v5-mission/build/
-*/build/                    # 捕获所有子模块的 build
\ No newline at end of file
+# app build 目录
+/app/build/
+
+# 删除这行：*/build/
+# 改为忽略所有 build，但排除 Opencv
+**/build/
+!/Opencv/build/           ← 关键：保留 Opencv 的 build 目录
\ No newline at end of file