The invention discloses a special power battery management system for an electric vehicle and an implementation method thereof. The power battery management system comprises a central control module, a measurement and control module, a battery pack, a motor controller, a direct-current motor, a vehicle-mounted charger, a current and electric quantity detection module, a vehicle-mounted liquid crystal display module, a switching group, a memory module, a clock module and a temperature management module. The system realizes communication of the central control module with the measurement and control module, the vehicle-mounted charger, the motor controller and the vehicle-mounted liquid crystal display module by only using a CAN communication bus. The battery management system has three working modes of charging, discharging and fault, and can realize acquisition, management and control for all parameter information on voltage, temperature, current, electric quantity and the like for the battery of the system, safe charging and fault early warning of the battery. Compared with the prior art, the battery management system has the advantages of higher reliability, charging safety, stable system work, comprehensive function and convenient subsequent expansion.