The invention belongs to the technical field of solar cells and particularly relates to a high-radiation solar cell backboard. The high-radiation solar cell backboard is characterized by comprising an anti-scraping wear-resistant coating, a first adhesive layer, an aluminum alloy layer, a second adhesive layer, an insulation isolation layer, a third adhesive layer and an ethylene-vinyl acetate bonding layer which are connected in sequence. The high-radiation solar cell backboard has the advantages that aluminum alloy is good heat conductor, and heat generated in a cell component can be dissipated timely so as to guarantee the service life of a solar cell; the compact structure of the aluminum coil is good in moisture blocking performance, so that the moisture transmittance of the backboard is 0.001g/m<2>*d; the production cost of the backboard is lowered, the backboard moisture transmittance is reduced, the radiation performance of the cell component is increased, and the service life of the cell component is prolonged.