Steering control equipment modifying system for automobile autonomous driving

The invention discloses a steering control equipment modifying system for automobile autonomous driving. The steering control equipment modifying system for automobile autonomous driving comprises an upper level control system, a power conversion circuit, a controller area network transceiver, a micro control unit and a motor driving board, wherein the upper level control system is connected with the controller area network transceiver; the power supply conversion circuit is respectively connected with the controller area network transceiver, the micro control unit and the motor driving board; and the micro control unit is respectively connected with the controller area network transceiver and the motor driving board. According to the invention, through adoptions of a steering control board and the motor driving board, a motor is controlled to do autonomous steering; through communication between the steering control board and the upper level control system, the motor driving board is instructed to drive and assist the motor so that rotation angle and rotation speed of the motor can reach a steering control purpose of automobile autonomous driving.