Reinforced sandwich composite board with dovetail grooves

The utility model discloses a reinforced sandwich composite board with dovetail grooves, which is characterized by consisting of a first layer of glass fiber woven mesh fine concrete board, a rigid polyurethane foam thermal insulation layer and a second layer of glass fiber woven mesh fine concrete board, dovetail grooves are correspondingly formed in the two side faces of the rigid polyurethane foam heat preservation layer, and the first glass fiber woven mesh fine concrete plate, the rigid polyurethane foam heat preservation layer and the second glass fiber woven mesh fine concrete plate are sequentially assembled and overlapped through the dovetail grooves and are bonded together through the adhesive layers. A plurality of layers of alkali-resistant glass fiber woven meshes are respectively laid in the first layer of glass fiber woven mesh fine concrete slab and the second layer of glass fiber woven mesh fine concrete slab; the energy waste is further avoided while the comfort level of a user is guaranteed