diff --git a/tauri-app/src-tauri/src/commands/video_compose.rs b/tauri-app/src-tauri/src/commands/video_compose.rs
index 415530b..14f245b 100644
--- a/tauri-app/src-tauri/src/commands/video_compose.rs
+++ b/tauri-app/src-tauri/src/commands/video_compose.rs
@@ -39,14 +39,14 @@ fn get_project_video_dir(app: &AppHandle, project_id: &str) -> Result<std::path:
         .map_err(|e| format!("获取项目视频目录失败: {}", e))
 }
 
-/// 校验视频比例是否为 9:16（允许 1% 误差）
+/// 校验视频比例是否为 9:16（允许 ±3% 容差）
 fn validate_nine_sixteen_aspect(width: u32, height: u32) -> Result<(), String> {
     if width == 0 || height == 0 {
         return Err("无法读取视频分辨率".to_string());
     }
     let ratio = width as f64 / height as f64;
     let expected = 9.0 / 16.0;
-    if (ratio - expected).abs() > 0.01 {
+    if (ratio - expected).abs() / expected > 0.03 {
         return Err(format!(
             "视频比例必须是 9:16，当前为 {}×{}（比例 {:.3}）",
             width, height, ratio
diff --git a/tauri-app/src-tauri/src/lib.rs b/tauri-app/src-tauri/src/lib.rs
index 5acc380..2f5e6bd 100644
--- a/tauri-app/src-tauri/src/lib.rs
+++ b/tauri-app/src-tauri/src/lib.rs
@@ -688,7 +688,7 @@ async fn video_composite_synthesis(
                 }
                 let ratio = meta.width as f64 / meta.height as f64;
                 let expected = 9.0 / 16.0;
-                if (ratio - expected).abs() > 0.01 {
+                if (ratio - expected).abs() / expected > 0.03 {
                     return ApiResponse {
                         code: 400,
                         message: format!(