The invention discloses a car washing robot and relates to the technical field of cleaning, the car washing robot comprises a main body assembly, a storage battery for providing energy for all electrical elements in the car washing robot is arranged in the main body assembly; a walking assembly and a rotating assembly are mounted on the main body assembly; a sweeping assembly is mounted on the rotating assembly; a vehicle body sensor capable of sensing the boundary of a vehicle body is arranged on the main body assembly; a controller capable of receiving a start-stop signal sent by a remote controller and vehicle body boundary information sensed by the vehicle body sensor and controlling the walking assembly, the rotating assembly and the sweeping assembly to work is arranged in the main body assembly; the robot can walk on a vehicle body of a curved surface structure through the walking assembly, the robot can be stably adsorbed on the vehicle body of the curved surface structure through the adsorption assembly, and therefore the cleaning assembly can clean some small areas or curved surface turning positions on the vehicle body.