▎ 摘　　要

NOVELTY - Energy-saving and heat-insulating polystyrene composite board comprises 50-100 pts. wt. polystyrene, 20-80 pts. wt. phase change material, 5-20 pts. wt. graphene, 10-25 pts. wt. foaming agent and 20-50 pts. wt. additive. The additive comprises inorganic additive or organic additive. The organic additive comprises ethylene-methacrylic acid copolymer or ethylene-acrylic acid copolymer. The inorganic additive comprises titanium dioxide, silica-base oxide and aluminum oxide. USE - Energy-saving and heat-insulating polystyrene composite board. ADVANTAGE - The energy-saving and heat-insulating polystyrene composite board has better heat preservation performance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing energy-saving and heat-insulating polystyrene composite board, which involves: (A) mixing the polystyrene, phase change material, graphene and the foaming agent; and (B) placing additive in a mold at 100-120 degrees C.