diff --git a/app/gl_tracking.c b/app/gl_tracking.c
index 6108d5c..b6bf79c 100644
--- a/app/gl_tracking.c
+++ b/app/gl_tracking.c
@@ -104,7 +104,7 @@ void MidLineTrack()
         int aim_idx = clip(round(aim_distance / RESAMPLEDIST), 0, rptsn_num - 1);
 
         // 近锚点位置
-        int aim_idx_near = clip(round(0.11 / RESAMPLEDIST), 0, rptsn_num - 1);
+        int aim_idx_near = clip(round(0.09 / RESAMPLEDIST), 0, rptsn_num - 1);
 
         // 计算远锚点偏差值
         dx = rptsn[aim_idx][1] - cx;