BootLoader program is the essential function of almost all intelligent devices. If the products are found to have significant BUG or need to be upgraded after leaving the factory, it can help engineers to easily update programs. Generally speaking, embedded software is more closely linked with the hardware. So that the successfully application of BootLoader program on different hardware platforms are diversified, in which, however, the same basic idea is applied. This paper raises several problems often encountered in the operation process of the BootLoader program and introduces the solutions for them by taking ColdFire V1 microcontroller MCF51AC MCU platform of Freescale Company as an example, which will present some references for the other platforms.