The invention discloses a solar tube cleaning device, and belongs to the field of mechanical cleaning. The solar tube cleaning device is composed of a cleaning pond, a conveying device, a bubble generation device, an ultrasonic generation device, a water circulation system, a PLC, a mechanical arm, a conveying rack, a placing rack, grooves, an air pump, an air distributor, an air supply pipe, branch pipes, air holes, a water return pipe, a filtering device, a water return pond, a water pump, a water inlet pipe, a water return valve, a check valve, a first filter, a second filter, a water supply pipe and electric heating tubes. The solar tube cleaning device is characterized in that the bubble generation device is arranged at the bottom of the cleaning pond; the conveying device is arranged above the cleaning pond and used for conveying solar tubes; the ultrasonic generation device is arranged on the side face of the cleaning pond; the water circulation system is connected with the cleaning pond; and the electric heating tubes are further arranged inside the cleaning pond, and the heating tubes are connected with the PLC. The solar tube cleaning device has the beneficial effects of being high in cleaning efficiency, low in damage rate and capable of saving water resources.