Automatic speed changing control system of electric automobile

An automatic speed changing control system of an electric automobile comprises an integral automobile controller, a speed sensor, a motor controller, a battery management system and an automobile transmission gear controller. The automatic transmission gear controller is connected to the integral automobile controller by a controller area network (CAN) bus, the integral automobile controller transmits a target switchover gear signal to the automatic transmission gear controller, and the automatic transmission gear controller executes gear shifting operation on a transmission gear. The effective automatic speed changing control system is composed of the integral automobile controller, the motor controller, the battery management system, the automatic transmission gear controller and the like to realize automatic speed changing of the electric automobile, facilitates drivers in driving operation, improves running safety of the electric automobile, and has the advantages of simple structure, convenience in connection and universal applicability.