Solar photovoltaic module surface cleaning device

The utility model relates to the field of surface cleaning of solar photovoltaic modules. A solar photovoltaic module surface cleaning device is characterized in that four stand columns are arranged at the four corners of a solar photovoltaic module respectively, bearings are installed at the tops of the two stand columns on the front side of the solar photovoltaic module respectively, shafts areinstalled in the two bearings, and one end of each shaft penetrates through the corresponding bearing and then is connected with an output shaft of a motor through a coupler; threads are arranged on the portion, between the two bearings, of the shaft, a horizontal column is arranged between the tops of the two stand columns on the rear side of the solar photovoltaic module, a cleaning device is installed on the shaft and the column, one end of the cleaning device is meshed with the threads through a bolt hole, and a sliding ring is arranged at the other end of the cleaning device and arrangedon the column in a sleevin