diff --git a/Ubiquitous/XiZi_IIoT/board/ch32v208rbt6/board.c b/Ubiquitous/XiZi_IIoT/board/ch32v208rbt6/board.c
index eb23113e1..c17c7cc7a 100644
--- a/Ubiquitous/XiZi_IIoT/board/ch32v208rbt6/board.c
+++ b/Ubiquitous/XiZi_IIoT/board/ch32v208rbt6/board.c
@@ -78,7 +78,7 @@ void readRomConfiguration(void) {
     if ((CFG->cfgFlag[0] != checkcode1) || (CFG->cfgFlag[1] != checkcode2)) {
         CFG_ERASE(PAGE_WRITE_START_ADDR, FLASH_PAGE_SIZE);
         CFG_WRITE(PAGE_WRITE_START_ADDR, (u8 *)&defaultConfiguration, MODULE_CFG_LEN);
-        KPrintf("%s NVIC_SystemReset\n", __func__);
+        KPrintf("%s NVIC_SystemReset\r\n\r\n", __func__);
         NVIC_SystemReset(); // 复位ch32v208
     }
 
diff --git a/Ubiquitous/XiZi_IIoT/board/ch32v208rbt6/third_party_driver/ota/Readme.md b/Ubiquitous/XiZi_IIoT/board/ch32v208rbt6/third_party_driver/ota/Readme.md
index 5cd6ead82..06152c822 100644
--- a/Ubiquitous/XiZi_IIoT/board/ch32v208rbt6/third_party_driver/ota/Readme.md
+++ b/Ubiquitous/XiZi_IIoT/board/ch32v208rbt6/third_party_driver/ota/Readme.md
@@ -1,5 +1,15 @@
 # 编译
-路径 Ubiquitous/XiZi_IIoT 下，执行 make BOARD=ch32v208rbt6 menuconfig，打开config 选项：
+生成支持OTA升级的固件，需要分别编译boot和app。其中，boot是升级需要的固件，app是正常系统固件。
+
+编译boot之前，需要在路径 Ubiquitous/XiZi_IIoT 下，执行：
+
+    cp board/ch32v208rbt6/.defconfig_boot board/ch32v208rbt6/.defconfig
+
+编译app之前，需要在路径 Ubiquitous/XiZi_IIoT 下，执行：
+
+    cp board/ch32v208rbt6/.defconfig_app board/ch32v208rbt6/.defconfig
+
+可以执行 make BOARD=ch32v208rbt6 menuconfig，查看config 选项。
 
      .config - XiZi_IIoT Project Configuration
      > Tool feature > OTA function > Enable support OTA function > Compile bootloader bin or application bin.
@@ -83,4 +93,3 @@ CH32V208的FLASH大小是480KB，其中零等待运行区域大小是128KB。FLA
 |0x08050000 ~ 0x08077000 | Boot_SLOW | 156KB |
 |0x08077000 ~ 0x08078000 | OTA_FLAG | 4KB |
 
-
diff --git a/Ubiquitous/XiZi_IIoT/tool/bootloader/ota/ota.c b/Ubiquitous/XiZi_IIoT/tool/bootloader/ota/ota.c
index 8175599ce..84f2f909e 100644
--- a/Ubiquitous/XiZi_IIoT/tool/bootloader/ota/ota.c
+++ b/Ubiquitous/XiZi_IIoT/tool/bootloader/ota/ota.c
@@ -486,14 +486,15 @@ static void BootLoaderJumpApp(void)
 
     if(p_ota_info->lastjumpflag == JUMP_FAILED_FLAG)
     {
-        mcuboot.print_string("\r\n------Jump to app partition failed,start version rollback!------\r\n");
         if(XIUOS_FLAH_ADDRESS == DOWN_FLAH_ADDRESS)
         {
+            mcuboot.print_string("\r\n------Jump to app partition failed, retry download!------\r\n");
             p_ota_info->status = OTA_STATUS_BOOT_DOWNLOAD;
             UpdateOTAFlag(p_ota_info);
         }
         else
         {
+            mcuboot.print_string("\r\n------Jump to app partition failed,start version rollback!------\r\n");
             BackupVersion();
         }
     }
@@ -1514,6 +1515,8 @@ void ota_entry(void)
                     extern int InitHwLte(void);
                     InitHwLte();
 #endif
+                    app_clear_jumpflag();
+
                     mcuboot.print_string("ota_entry to XiUOSStartup\r\n");
                     extern int XiUOSStartup(void);
                     XiUOSStartup();