The power station is an important part of the vehicle system. With the development of the reliability and maneuverability of the system, the demand for low-power power station increases continuously. And the same platform is always needed to be shared by a power station and a system. A kind of ventilation and heat dissipation design of vehicle dual-unit low-power power station is introduced. Based on the structure design of inlet duct, the amount of heat dissipation calculation in a power station and the selection method of axial fans, the application tech. nology basis of the low-power air-cooled power station which will equipped on vehicle system is provided.