The invention provides a steering system capable of switching various steering modes and belongs to the technical field of electric automobile driving. The steering system comprises a left steering wheel, a steering gear, a right steering wheel, an angle and torque sensor I, a power transmission gear set, a clutch, an EPS motor, an EPS controller, an angle and torque sensor II, an angle and torque sensor III, a steering wheel, a servo motor, a steering column, a servo motor controller and an automobile control system. Through deep analysis of the requirements for the steering system of an unmanned automobile, the steer-by-wire technology is combined with the EPS technology, an automatic / manual steering function is achieved, and the control accuracy of the steering angle in the automatic driving process is guaranteed; and in the manual steering mode, the manual steering mode based on steer-by-wire or mechanical steering can be selected according to the requirements of a driver.