diff --git a/packages/core/src/createInput/touch.ts b/packages/core/src/createInput/touch.ts
index 7c9c7f68..e24a528d 100644
--- a/packages/core/src/createInput/touch.ts
+++ b/packages/core/src/createInput/touch.ts
@@ -16,6 +16,12 @@ export default function (el?: Element) {
                 targets.push(target);
                 points.push({ clientX, clientY, target });
             }
+            // 未指定根元素的情况下，应当将所有touch点都视作有效，
+            // 否则points为空，将会报错
+            if (!el) {
+                if (target) targets.push(target);
+                points.push({ clientX, clientY, target });
+            }
         });
         const changedPoints = Array.from(event.changedTouches).map(({ clientX, clientY, target }) => ({ clientX, clientY, target }));
         return createInput({