Novel fly ash composite board

The utility model discloses a novel fly ash composite board which comprises a composite board, the composite board comprises a base material, a filler layer, a co-extrusion surface layer and embossing, the base material, the filler layer, the co-extrusion surface layer and the embossing are of an integrated structure, the base material is located on the lowermost layer, the thickness of the base material is 3 cm, an installation buckle is fixed to the bottom face of the base material, the upper surface of the base material is filled with the filler layer, the thickness of the filler layer is 0.2 cm, and the thickness of the coextrusion surface layer is 0.2 cm. A co-extrusion surface layer is arranged above the filler layer, the thickness of the co-extrusion surface layer is 0.5 cm, uniformly distributed embossing is extruded on the co-extrusion surface layer, a surface co-extrusion method is adopted, a base material raw material is extruded in a main extruder, meanwhile, a co-extrusion surface layer raw mater