Abstract: According to the status that popularization and application of flame-proof battery electric vehicle was severely restricted by the driving range, the driving range influence factors of vehicle parameters, flame-proof battery,flame-proof drive motor control system and drive mode were studied. The method which can maximize improvement of the flame-proof battery electric vehicle driving range on the condition of lower energy density of battery was presented. Based on the VehSpy3 platform, the driving range test system of electric flame-proof vehicles was built. And according to the working conditions of constant speed and Wangjialing auxilary transport port, the influence factors and test analysis on the driving range for a certain type of flame-proof battery electric vehicle of before and after optimization were finished.The results show that all optimized influence factors are improved to varying degrees, the driving range of constant speed working conditions increases about 10 km, the driving range of mine multiple continuous increases 7.1 km. The method can effective promote the driving range of flame-proof battery electric vehicle and provide the theoretical basis for the development and popularization of flame-proof battery electric vehicle.