The invention provides a double-surface power generating photovoltaic assembly which belongs to the field of photovoltaic power generation. The double-surface power generating photovoltaic assembly comprises a plurality of double-surface power generating cell plates. A welding strip is welded on each double-surface power generating cell plate. Packaging is performed through front toughened glass and back toughened glass. The welding strip is a concave-convex double-surface light reflecting welding strip. The concave-convex surface at one side of the concave-convex double-surface light reflecting welding strip is welded with the double-surface power generating cell plate, and the concave-convex surface at the other side is used for receiving and reflecting electric energy. The back toughened glass is provided with a white glaze-plated part which is arranged at a non-cell-plate part of the back toughened glass. After light is incident through the front toughened glass and the back toughened glass, the incident light is reflected to the double-surface power generating cell plate through the white glaze-plated part and the concave-convex double-surface light reflecting welding strip. According to the double-surface power generating photovoltaic assembly, through using the white glaze-plated back toughened glass and the concave-convex double-surface light reflecting welding strip, the light can be reflected to the cell plate by the front surface and the back surface of the assembly, and more incident light in different angles is reflected to the cell plate. Furthermore power generation amount of the assembly is improved.