Abstract: The method combining fuzzy with slide mode varying structure control is applied to the motor vehicle sensotronic brake control (SBC) system. The integration uncertain border value is estimated by fuzzy inference and the soft switch control is accomplished by tanh(x) function replacing sgn(x). The automobile SBC system based fuzzy-soft switch control is designed. The computer simulation is fulfilled for this system by using Matlab/Simulink software and the braking performance is tested on the test-bed. The results show that difference between the simulation results and the test is smaller. The buffeting is reduced and its braking is smooth.