Abstract: Aiming at the problem of increasing peak-valley difference of the system caused by network connection of the electric vehicle (EV), this paper takes the combined heat and power generation (CHP) microgrid containing the EV load as the research object, and proposes an optimization model of demand response and orderly dispatching of the EV. It firstly takes the time-of-use (TOU) electricity price as the decision variable and establishes the demand response model of users' conventional load. Secondly, combining with the TOU electricity price and the optimized load curves after the demand response, it guides orderly charging and discharging of the EV to participate in the microgrid scheduling. It establishes a day-ahead optimal scheduling model to minimize the operating cost of the microgrid, and uses the particle swarm optimization (PSO) algorithm to solve the model. Finally, it verifies the effectiveness and economy of the model by taking the grid-connected CHP microgrid in a certain area as an example.