In order to improve the vehicle comfort,a quarter active suspension model was established,and the strategy of fuzzy adaptive PID control was proposed.Meanwhile,VHDL language was selected to realize fuzzy control at RTL level based on FPGA platform.A PID controller was designed and its parameters were modified by the fuzzy controller with qualities of parameter selfregulating function,in which the body vertical vibration velocity and acceleration were used as the input source.The comparison study through simulation by using MATLAB/Simulink shows that ride comfort performance of active suspension with fuzzy adaptive PID controller is better than that of passive suspension.Fuzzification,fuzzy inference and defuzzification were realized respectively by using the VHDL language based on FPGA.