The invention discloses a solar glass tube automatic cleaning device. The device is composed of wheels, a supporting frame, an upper supporting plate, a hand supporting frame, a feeding mechanism, a cleaning mechanism, a discharging mechanism, a cleaning liquid conveying pipe, and a grooved wheel mechanism, and is mainly composed of an intermittent feeding mechanism, an intermittent grooved wheelmechanism, an automatic cleaning mechanism and an intermittent discharging mechanism, the intermittent movement of the grooved wheel mechanism is controlled, so that the feeding, cleaning and discharging processes of a solar glass tube are realized, and the whole process is completely driven by a motor to complete automatic cleaning of all the solar glass tubes. The device has the beneficial effects of being simple in structure, convenient to operate and high in cleaning efficiency, the fully-automatic operation of feeding, cleaning and discharging of the solar glass tubes is realized, and thedevice is suitable for large-scale fully-automatic cleaning of the solar glass tubes.