Configuration of hybrid electric vehicle equipped with electrical-mechanical continuously variable transmission(EM-CVT) is put forward based on the analysis of work principle of mechanic-electric CVT. The mathematic models of power sources and EM-CVT are built up. According to configuration, the HEV working modes are defined. Based on the dynamic characteristics of drive line, a control strategy for mode-switch is put forward to reduce switch shock. Engine, ISG-motor, automatic clutch and EM-CVT are controlled integrally in this strategy. Forward simulation model of HEV is built on MATLAB/SIMULINK platform. Simulation results show that the switch shock is controlled in an acceptable range by using the proposed control strategy.