Photovoltaic module cleaning device for agriculture and light complementary system

The utility model provides a photovoltaic module cleaning device for an agriculture and light complementation system, the agriculture and light complementation system comprises a plurality of agriculture and light complementation devices which are sequentially arranged from a high terrain area to a low terrain area, and the photovoltaic module cleaning device comprises a plurality of cleaning mechanisms; each cleaning mechanism is used for being arranged between every two adjacent agriculture and light complementary devices in a one-to-one correspondence mode. Each cleaning mechanism comprises a rainwater collecting assembly, a spraying assembly and a control valve. The height of a water tank in the rainwater collecting assembly is larger than that of each first spray head in the spraying assembly, the water tank collects rainwater, and a nozzle of each first spray head faces a photovoltaic panel of the photovoltaic assembly corresponding to the first spray head; each first nozzle is connected with the water