diff --git a/app/src/main/java/com/huanchengfly/tieba/post/activities/ForumActivity.kt b/app/src/main/java/com/huanchengfly/tieba/post/activities/ForumActivity.kt
index 46b7c51c..c978e765 100644
--- a/app/src/main/java/com/huanchengfly/tieba/post/activities/ForumActivity.kt
+++ b/app/src/main/java/com/huanchengfly/tieba/post/activities/ForumActivity.kt
@@ -496,9 +496,9 @@ class ForumActivity : BaseActivity(), View.OnClickListener, OnRefreshedListener,
                         refresh()
                     }
                     "back_to_top" -> {
-                        mAdapter?.currentFragment?.apply {
+                        mAdapter?.getItem(headerTabView.selectedTabPosition)?.apply {
                             if (this is ScrollTopable) {
-                                scrollToTop()
+                                this.scrollToTop()
                             }
                         }
                     }
diff --git a/app/src/main/java/com/huanchengfly/tieba/post/fragments/ForumFragment.kt b/app/src/main/java/com/huanchengfly/tieba/post/fragments/ForumFragment.kt
index 9a1b6d20..2069fa55 100644
--- a/app/src/main/java/com/huanchengfly/tieba/post/fragments/ForumFragment.kt
+++ b/app/src/main/java/com/huanchengfly/tieba/post/fragments/ForumFragment.kt
@@ -253,7 +253,9 @@ class ForumFragment : BaseFragment(), Refreshable, OnSwitchListener, ScrollTopab
     }
 
     override fun scrollToTop() {
-        virtualLayoutManager.scrollToPosition(0)
+        mRecyclerView.post {
+            virtualLayoutManager.scrollToPosition(0)
+        }
     }
 
     interface OnRefreshedListener {