The invention relates to a high-definition monitoring system capable of automatically cleaning a camera. The system comprises a rotary bearing disk, a mounting seat, a rotary motor, rotary slide rods,a rotary slide chute, and a cleaning device; the rotary motor is arranged at the bottom of the rotary bearing disk, the mounting seat is arranged at a rear end of the rotary bearing disk, the cleaning device is arranged on an output shaft of the rotary motor, the rotary slide chute is arranged on the bottom of the rotary bearing disk, the rotary slide rods are symmetrically distributed at the outside of the rotary motor, the bottoms of the rotary slide rods are arranged at an upper end of the cleaning device, and the tops of the rotary slide rods are connected with the rotary slide chute in asliding cooperation way. The problems that the camera cannot be mechanically cleaned, the manual camera cleaning effect is bad, the manual camera cleaning has a certain dangerousness, and the dead angles of the camera cannot be cleaned in the existing camera cleaning can be solved.