The invention provides a stone-plastic wallboard which comprises 50-80 parts of calcite powder, 40-60 parts of PVC (Polyvinyl Chloride) resin, 20-30 parts of chloroprene rubber, 33-43 parts of butadiene-acrylonitrile rubber, 3-5 parts of conductive fibers, 30-50 parts of marble powder, 4-8 parts of processing aids, 4-8 parts of a modifier, 1-3 parts of a stabilizer, 2-5 parts of a foaming agent, 1-5 parts of a lubricating agent, 90-100 parts of semi-hydrated gypsum, 1-3 parts of bamboo charcoal fibers, 2-5 parts of methyl cellulose, 3-7 parts of ethyl cellulose, 20-30 parts of a stone-like coating and 3-6 parts of polyvinyl alcohol. According to the stone-plastic wallboard disclosed by the invention, the calcite powder, the marble powder, the semi-hydrated gypsum, the PVC resin, chloroprene rubber and the butadiene-acrylonitrile rubber are mixed, so that the prepared stone-plastic wallboard has excellent mechanical strength, tensile strength and crack resistance, the activity of the semi-hydrated gypsum is improved, the content of soluble impurities in the semi-hydrated gypsum is reduced, a pulverization phenomenon on the surface of a gypsum base material is further avoided, and the strength and toughness of the semi-hydrated gypsum base material are improved, so that the gypsum is applied to the field of building materials in a wide range, the inventory of phosphogypsum in the natural world is reduced, and the environmental pollution is reduced.