High-strength water-resistant rock wool phosphogypsum wallboard and preparation method thereof

The invention provides a high-strength water-resistant rock wool ardealite wallboard and a preparation method thereof, the wallboard comprises an ardealite board and rock wool, the ardealite board is prepared from the following raw materials in parts by weight: 30-60 parts of ardealite, 20-30 parts of quick lime, 5-10 parts of modified solid epoxy resin and 0.01-0.1 part of a retarder, and the addition amount of water is 1.5 times of the total amount of the quick lime and the ardealite; the modified solid epoxy resin is powder prepared by blending and extruding 100 parts of a solid epoxy resin E20 or MPES-904 raw material, 20-30 parts of an anhydride curing agent, 1-3 parts of an imidazole curing agent and 3-5 parts of an amphoteric active agent; the anhydride curing agent is phthalic anhydride or tetrahydrophthalic anhydride, the imidazole curing agent is dimethylimidazole, and the amphoteric active agent is sodium dodecyl benzene sulfonate; and the retarder is citric acid, sodium tripolyphosphate or sodium