Abstract: In order to solve the problem of low input voltage range and low utilization ratio of vehicle converter and energy management system, an integrated vehicle parking charging and discharging scheme is proposed in this paper. Compared with the conventional electric vehicle charge and discharge technology, this scheme not only realizes the energy interaction between the vehicle hybrid energy sources and the vehicle DC bus and micro-grid, providing the possibilities for peak load shifting for the connected DC micro-grid, but also reduces the charging voltage level of the electric vehicle charger. Last but not least, this scheme also greatly broadens the vehicle power battery charging method and maximizes the utilization of the vehicle converter, vehicle energy management system and power motor. Finally, an experimental platform of 1.2 kW hybrid energy sources charging and discharging system is built, which verifies the rationality and feasibility of the integrated parking charging and discharging scheme, so the scheme proposed in this paper can be further popularized and realized in the field of electric vehicle charge and discharge technology research in the future.