Abstract: According to the related problems of controlling pressure of a clutch during the shift process of wet DCT, the model of the hydraulic control system for wet DCT is designed. In establishing the control strategy of cluth pressure of DCT based on the state of clutches, the fuzzy control algorithm of the oil pressure of the clutch is designed. The simulation model of the control system is built using MATLAB/Simulink and the simulation curve of shift jerk and friction work is set up, and proved correctness of the models of hydraulic control system and the validity of the control algorithm through the simulation of the upshift and downshift process.