diff --git a/padsleep_tui.py b/padsleep_tui.py
index 8e4f117..1e508f1 100644
--- a/padsleep_tui.py
+++ b/padsleep_tui.py
@@ -135,7 +135,6 @@ class TuiApp:
 
         while True:
             self.height, self.width = self.stdscr.getmaxyx()
-            self.stdscr.clear()
             self._draw()
             self.stdscr.refresh()
 
@@ -224,6 +223,14 @@ class TuiApp:
         y = self._draw_status_panel(y)
         self._draw_bottombar()
 
+    def _clear_line(self, y: int):
+        """清空指定行，防止残留内容。"""
+        if 0 <= y < self.height:
+            try:
+                self.stdscr.addstr(y, 0, " " * self.width)
+            except curses.error:
+                pass
+
     def _draw_titlebar(self):
         h, w = self.height, self.width
         title = " padsleep 配置工具 "
@@ -258,6 +265,7 @@ class TuiApp:
         periods = (self.config or {}).get("screen_on_periods", [])
         if not periods:
             if y < h:
+                self._clear_line(y)
                 try:
                     self.stdscr.addstr(y, 4, "(暂无时间段 — 按 A 新增)")
                 except curses.error:
@@ -266,6 +274,7 @@ class TuiApp:
         else:
             # 表头
             if y < h:
+                self._clear_line(y)
                 try:
                     self.stdscr.addstr(y, 4, " #  │ 开始  │ 结束  │", curses.A_UNDERLINE)
                 except curses.error:
@@ -274,6 +283,7 @@ class TuiApp:
             for i, p in enumerate(periods):
                 if y >= h:
                     break
+                self._clear_line(y)
                 sel = "▸" if i == self.selected else " "
                 line = f"{sel}{i+1:>2} │ {p['start']} │ {p['end']}  "
                 try:
@@ -286,6 +296,7 @@ class TuiApp:
                 y += 1
 
         if y < h:
+            self._clear_line(y)
             try:
                 self.stdscr.addstr(y, 4, "[A]新增  [E]编辑  [D]删除  ↑↓选择", curses.A_DIM)
             except curses.error:
@@ -298,6 +309,7 @@ class TuiApp:
 
         if self.status:
             dev = self.status.get("device") or "未选择"
+            self._clear_line(y)
             try:
                 self.stdscr.addstr(y, 4, f"当前设备: {dev}")
             except curses.error:
@@ -308,6 +320,7 @@ class TuiApp:
             for d in self.devices:
                 if y >= h:
                     break
+                self._clear_line(y)
                 icon = "✓" if d["status"] == "device" else "✗"
                 pair = 3 if d["status"] == "device" else 2
                 try:
@@ -318,6 +331,7 @@ class TuiApp:
                 y += 1
         else:
             if y < h:
+                self._clear_line(y)
                 try:
                     self.stdscr.addstr(y, 4, "(无设备 — 请连接平板)")
                 except curses.error:
@@ -325,6 +339,7 @@ class TuiApp:
                 y += 1
 
         if y < h:
+            self._clear_line(y)
             try:
                 self.stdscr.addstr(y, 4, "[S]选择设备  [R]刷新", curses.A_DIM)
             except curses.error:
@@ -348,6 +363,7 @@ class TuiApp:
             wf = s.get("wakefulness", "?")
 
             if y < h:
+                self._clear_line(y)
                 try:
                     self.stdscr.addstr(y, 4, "屏幕: ")
                     self.stdscr.addstr(f"{sc}", curses.color_pair(sc_color) | curses.A_BOLD)
@@ -356,6 +372,7 @@ class TuiApp:
                     pass
             y += 1
             if y < h:
+                self._clear_line(y)
                 try:
                     self.stdscr.addstr(y, 4, "时段内: ")
                     self.stdscr.addstr(f"{wp}", curses.color_pair(wp_color) | curses.A_BOLD)
@@ -364,6 +381,7 @@ class TuiApp:
                     pass
             y += 1
             if y < h:
+                self._clear_line(y)
                 try:
                     self.stdscr.addstr(y, 4, "ADB: ")
                     self.stdscr.addstr(f"{ar}", curses.color_pair(ar_color) | curses.A_BOLD)
@@ -372,6 +390,7 @@ class TuiApp:
             y += 1
         else:
             if y < h:
+                self._clear_line(y)
                 try:
                     self.stdscr.addstr(y, 4, "(未连接守护进程 — 按 T 重连)")
                 except curses.error:
@@ -398,6 +417,7 @@ class TuiApp:
         bar_y += 1
         if bar_y >= h:
             return
+        self._clear_line(bar_y)
         msg = self.message
         if msg and time.time() - self.msg_time < 5:
             pass  # show message below separator