Prefabricated high-ductility fair-faced concrete sandwich heat-preservation wallboard

The invention discloses a prefabricated high-ductility fair-faced concrete sandwich heat-preservation wallboard which comprises a high-ductility fair-faced concrete board, an FRP grid, a sandwich heat-preservation layer and connecting pieces. a wallboard body is composed of an inner high-ductility fair-faced concrete board and an outer high-ductility fair-faced concrete board, the FRP grating is embedded in the high-ductility fair-faced concrete board, the sandwich heat preservation layer is arranged between the inner board and the outer board, the distance between the inner board and the outer board is the same as the thickness of the sandwich heat preservation layer, and the inner high-ductility fair-faced concrete board, the outer high-ductility fair-faced concrete board and the sandwich heat preservation layer are connected through the connecting pieces. The heat preservation wallboard has a good heat preservation effect, can resist corrosion of chloride ions, has a water seepage prevention function, is l