This paper concentrates on modeling of the electro-hydraulic actuator of dual clutch transmission. A dynamic model of the electro-hydraulic actuator based on mathematical description has been developed by using Matlab/Simulink as the simulation platform. The simulated results are consistent with the experimental results, which show the correctness of the model. This model can be used to study dynamic characteristics of the hydraulic actuator of wet dual clutch transmission and to validate control algorithm.