With the improvement of people's living standards, many people will choose to buy cars, and there are more and more cars on the road. In big cities, there are many serious traffic roads, so emergency braking cannot be avoided when driving. In order to avoid traffic accidents, necessary emergency braking must be taken for vehicles. Although this great influence is analyzed according to the stress situation, the driving force on both sides of the wheel and the transverse force of the vertical reaction force are still working.