The invention relates to a novel solar battery backboard, which comprises the following components according to the adhesion in turn: a weathering layer, a first adhesive layer, a structure-enhancing layer, a second adhesive layer and an adhesive reflecting layer; wherein, the weathering layer is a polyvinylidene fluoride alloy layer modified by inorganic materials; the adhesive reflecting layer is a white polyethylene layer; preferably, the polyvinylidene fluoride alloy layer is a plastic alloy layer formed by the polyvinylidene fluoride and the inorganic materials with the thickness of 4-40 mum; the white polyethylene layer is a plastic alloy layer in which polyethylene is mixed with inorganic white pigment, anti-ultraviolet stabilizer and hot-oxygen ageing resistance stabilizer with the thickness of 10-300mum; the structure-enhancing layer is a polyethylene qlycol terephthalate layer; the first adhesive layer and the second adhesive layer can be one of the following three, namely, a polyurethane adhesive layer, an acrylic ester adhesive layer or an epoxy adhesive layer with the thickness of 1mum-30mum. The invention features novel structure, easily obtained materials, greatly reduced cost and good performance, conforms to the requirements of the backboard, and has important significance on solar energy industry.