diff --git a/packages/model3d-viewer/src/loader.ts b/packages/model3d-viewer/src/loader.ts
index 018b5b949..574d8c153 100644
--- a/packages/model3d-viewer/src/loader.ts
+++ b/packages/model3d-viewer/src/loader.ts
@@ -99,7 +99,15 @@ export async function readModel3dViewerSourceBytes(
     assertModel3dViewerByteLength(declaredLength);
   }
 
-  const data = await response.arrayBuffer();
+  let data: ArrayBuffer;
+  try {
+    data = await response.arrayBuffer();
+  } catch (error) {
+    throw new Model3dViewerLoadError(
+      'load-failed',
+      `模型数据读取失败：${describeModel3dViewerError(error)}`,
+    );
+  }
   assertModel3dViewerByteLength(data.byteLength);
   return data;
 }