In order to meet the demand of domestic replacement of self-control devices, a vehicle fire-fighting controller based on domestic SOC (FPGA + MCU) M7A12N5L144 is designed by using FPGA. The overall design idea of vehicle fire controller is given, and its hardware circuit is described in detail. The signals of various flame sensors and the status signals of fire extinguisher are collected through the AD port and IO port integrated in M7A12N5L144. The results show that when the conditions meet the fire conditions, the controller drives the fire extinguisher to spray out fire extinguishing agent to extinguish the fire in passenger compartment and power cabin, and at the same time, the situation is transmitted to the external system through can communication bus. The controller is simple to develop and reliable in performance, and can be used for fire fighting and safety protection of vehicle power system and passenger compartment.