Phase change gypsum board for construction

The invention discloses a phase change gypsum board for construction. The gypsum board includes, by weight, 40-70 parts of gypsum powder, 40-100 parts of a phase change material compound, 20-60 partsof expanded slag lightweight aggregate, 0.5-2 parts of a chopped fiber, 1-5 parts of a water reducing agent, and 60-150 parts of water; the phase change material compound includes, by weight, 90-110 parts of a phase change material, 20-40 parts of montmorillonite, and 100-300 parts of water; the phase change material includes one or more of an aliphatic hydrocarbon compound, an alcohol compound oran ester compound; the aliphatic hydrocarbon compound is selected from one or more of N-hexadecane, n-octadecane or eicosane; the alcohol compound is selected from one or more of dodecyl alcohol, cyclohexanol, tert-butyl alcohol or neopentylene glycol; and the ester compound is n-butyl stearate. The gypsum board is good in product mechanical strength, large in energy storage density and suitablefor energy-saving insulatio