Considering the influence of electric vehicle load, a capacity optimization configuration method of micro-grid with WT-PV-DEBES considering electric vehicles is proposed. The modeling methods of load, wind power, photovoltaic system, battery energy storage anddiesel power generation in the microgrid are presented. Considering the dynamic characteristics of the test system, the Grey Wolf Optimiz?er is used to opti-mize the capacity of wind turbine, photovoltaic system, battery energy storage and diesel generator with the goal of mini?mizing the total cost of the micro grid system. Taking an actual 17 nodes microgrid as an example, the simulation results show that the loadin the microgrid system is provided by distributed new energy as far as possible, which effectively reduces greenhouse gas emissions, whileminimizing the total cost of the mi-crogrid system. The system can supply load economically and reliably according to the proposed method。