The present invention provides a power steering device, comprising a front oil pipe, a rear oil pipe, a power cylinder, and a support; the power cylinder is a hydraulic oil cylinder, the rear end of the oil cylinder body is connected to the support, and the front end of the piston is connected to the swing arm; one end of the front oil pipe communicates with the oil chamber at the front end of the piston of the power cylinder, and the other end communicates with the upper oil chamber of the steering gear; one end of the rear oil pipe communicates with the oil chamber at the rear end of the piston of the power cylinder, and the other end communicates with the lower oil chamber of the steering gear.
