To solve the problem that the vendor provides no support for developing embedded software based on SM9B100MAL platform in IAR integrated development environment (IDE), the method of adding new device support for IAR is provided. By analyzing the IAR IDE, C-SPY debugger, Flash Loader framework, and device description configuration, etc. Provide the reference configuration, codes and comments, and display the process for adding processor support. The results show that after adding support, under IAR IDE, realize the functions more efficiently, such as the fast creating code process, one-click downloading program, debugging dialog structure display register.