The invention discloses an electrified water-washing operation device for electrical equipment. The device comprises a mechanical arm with a washing device, a rotary table with a driving device and a walking chassis, wherein the rotary table is connected between the chassis and the mechanical arm; the rotating motion of the rotary table can drive the mechanical arm to rotate so as to adjust the operation position of the mechanical arm; the mechanical arm further comprises a sliding frame and a slidable water-passing sliding table in sliding connection with the sliding frame; the washing device is connected with the front end of the water-passing sliding table; the water-passing sliding table is connected with a high-pressure buffer water tank through a high-pressure hose; the lower end of the sliding frame is connected with the rotary table through a bracket; a lifting device is connected between the sliding frame and the rotary table. The rotary table of the electrified water-washing operation device can automatically drive the mechanical arm to rotate and switch, the mechanical arm can be automatically pitched for adjusting the angle and the water-passing sliding table of the mechanical arm can automatically move up and down along the sliding frame so as to adjust the most suitable washing position and freely adjust the washing height and angle, so that the washing operation is flexible and convenient, the washing distance is effectively shortened, the safety and high efficiency are ensured and the manpower and material resources are saved.