By analyzing the structure characteristics of dual-clutch transmission（DCT）and using the Matlab/Simmechincs

the physical model of DCT is established.Through analyzing the relation of engine torque and engine speed

the constant speed starting is achieved.According to engine torque

clutch transmission torque

clutch sliding rate and vehicle resistance

the sliding mode controller is established

which control the exports clutch oil press.The strategy of first gear starting using single clutch and first gear starting using two clutches together working is formulated

and the simulation of vehicle starting under the conditions of light load

middle load and heavy load is carried out

and the correctness of sliding mode controller is verified

and the clutch combining time

starting smoothness and friction work is the evaluation index of starting.In the final

under the conduction of light load

the simulation of the sliding mode controller to control the dual clutch starting is compared with the simulation of PID control the dual clutch starting.The simulation results show that

the sliding mode controller can achieve smooth starting of DCT vehicle

and starting using dual clutches can shorten the time of starting

reduce single clutch friction work and endure the life of clutch.