Research on mini2440 platform with ARM9 series S3C2440 processor core, methods to transplant U-Boot. Based on the mini2440 platform hardware resources, to modify the U-Boot source code, and then to modify the source code to be compiled, will generate the u-boot.bin file to download to the mini2440 development board to run, and the U-Boot functional testing, test results show that U-Boot successfully in the development board to run, and can realize its function. The transplant method to use S3C2440 processor for embedded system design and U-Boot in other processor transplantation has reference value.