The invention belongs to the technical field of photovoltaic devices, and particularly relates to a photovoltaic panel cleaning device. The device solves the problems that photovoltaic panel cleaningis not efficient, and in the cleaning process, manual operation is not much. According to the device, the device comprises a bottom plate, the outer wall of the top of the bottom plate is fixedly provided with a cleaning box through a bolt, the outer wall of the top of the cleaning box is fixedly provided with a display screen through a bolt, the outer wall of the top of the bottom plate is fixedly provided with a mounting box through a bolt, a partition board is welded to the middle of the mounting box, a processor is fixed to the upper layer of the partition board through a bolt, a storage battery is fixed to the inner wall of the bottom of the mounting box through a bolt, and an air blower and a heater are fixed to the outer wall of the top of the mounting box through bolts. Efficient cleaning can be finished, an electric telescopic rod can adjust cleaning height, according to actual condition, adjustment is carried out, actual work needs are met, a photovoltaic panel is subject tocomprehensive cleaning, the device is convenient and flexible, the cleaned photovoltaic panel is dried, and use is facilitated.