diff --git a/26_day/bootpack.c b/26_day/bootpack.c
index 0ebdc8e..fe80698 100644
--- a/26_day/bootpack.c
+++ b/26_day/bootpack.c
@@ -15,7 +15,7 @@ void HariMain(void)
 	char s[40];
 	struct FIFO32 fifo, keycmd;
 	int fifobuf[128], keycmd_buf[32], *cons_fifo[2];
-	int mx, my, i;
+	int mx, my, i, new_mx = -1, new_my = 0, new_wx = 0x7fffffff, new_wy = 0;
 	unsigned int memtotal;
 	struct MOUSE_DEC mdec;
 	struct MEMMAN *memman = (struct MEMMAN *) MEMMAN_ADDR;
@@ -131,8 +131,19 @@ void HariMain(void)
 		}
 		io_cli();
 		if (fifo32_status(&fifo) == 0) {
-			task_sleep(task_a);
-			io_sti();
+			/* FIFO为空，当存在搁置的绘图操作时立即执行*/
+			if (new_mx >= 0) {
+				io_sti();
+				sheet_slide(sht_mouse, new_mx, new_my);
+				new_mx = -1;
+			} else if (new_wx != 0x7fffffff) {
+				io_sti();
+				sheet_slide(sht, new_wx, new_wy);
+				new_wx = 0x7fffffff;
+			} else {
+				task_sleep(task_a);
+				io_sti();
+			}
 		} else {
 			i = fifo32_get(&fifo);
 			io_sti();
@@ -232,7 +243,8 @@ void HariMain(void)
 					if (my > binfo->scrny - 1) {
 						my = binfo->scrny - 1;
 					}
-					sheet_slide(sht_mouse, mx, my);/* 包含sheet_refresh含sheet_refresh */
+					new_mx = mx;
+					new_my = my;
 					if ((mdec.btn & 0x01) != 0) { /* 按下左键 */
 						if (mmx < 0) {
 							/*如果处于通常模式*/
@@ -253,6 +265,7 @@ void HariMain(void)
 											mmx = mx; /*进入窗口移动模式*/
 											mmy = my;
 											mmx2 = sht->vx0; 
+											new_wy = sht->vy0;
 										}
 										if (sht->bxsize - 21 <= x && x < sht->bxsize - 5 && 5 <= y && y < 19) {
 											/*点击“×”按钮*/
@@ -271,14 +284,19 @@ void HariMain(void)
 							}
 						} else {
 							/*如果处于窗口移动模式*/
-							x = mx - mmx; /*计算鼠标的移动距离*/
+							x = mx - mmx; /*计算鼠标指针移动量*/
 							y = my - mmy;
-							sheet_slide(sht, (mmx2 + x + 2) & ~3, sht->vy0 + y);
-							mmy = my; /*更新到移动后的坐标*/
+							new_wx = (mmx2 + x + 2) & ~3;
+							new_wy = new_wy + y; 
+							mmy = my;
 						}
 					} else {
 						/*没有按下左键*/
-						mmx = -1;	/*返回通常模式*/
+						mmx = -1; /*切换到一般模式*/
+						if (new_wx != 0x7fffffff) {
+							sheet_slide(sht, new_wx, new_wy); /*固定图层位置*/
+							new_wx = 0x7fffffff;
+						} 
 					}
 				}
 			}