A motion model of a high clearance fourwheel drive spray machine chassis of the work process was established and a slip control based on fuzzy control system was realized through the relative slip rate as control objectives. Antiskid controller was designed, simulation had been carried out by Matlab/Simulink and the antiskid electrohydraulic system test device was constructed. The simulated test results showed that the four wheel drive high clearance spraying electrohydraulic antiskid control system worked well, the control response time was 185s, and the control precision reached to as accurate as 97.3%.