diff --git a/android/app/src/main/java/com/tiangong/aiagent/ui/chat/ChatScreen.kt b/android/app/src/main/java/com/tiangong/aiagent/ui/chat/ChatScreen.kt
index 44bca43..b939134 100644
--- a/android/app/src/main/java/com/tiangong/aiagent/ui/chat/ChatScreen.kt
+++ b/android/app/src/main/java/com/tiangong/aiagent/ui/chat/ChatScreen.kt
@@ -261,7 +261,7 @@ fun ChatScreen(
                                     Text(if (uiState.editingMessageId != null) "编辑消息..." else "输入消息...")
                                 },
                                 modifier = Modifier.weight(1f),
-                                maxLines = 4,
+                                maxLines = 8,
                                 enabled = !uiState.isLoading && !uiState.isStreaming
                             )
                             Spacer(modifier = Modifier.width(8.dp))