A-grade flame-retardant polystyrene thermal insulation template and preparation method thereof

The invention relates to the technical field of composite boards, in particular to an A-grade flame-retardant polystyrene thermal insulation template, and the template comprises polystyrene boards andpouring slurry between the polystyrene boards, wherein the pouring slurry comprises 100 parts by weight of water, 5-20 parts by weight of a binder, 20-50 parts by weight of a hydroxide flame retardant, 5-20 parts by weight of a silicate charring agent and 0.5-5 part by weight of a foaming agent. The invention further discloses a preparation method of the A-grade flame-retardant polystyrene thermal insulation template, and the preparation method comprises preparation of pouring slurry and bonding and pressing of the boards, wherein the binder comprises the following components: 5-15 parts of an aerogel matrix, 0-10 parts of an aerogel cross-linking agent, 10-50 parts of nano clay, 15-30 parts of aluminum dihydrogen phosphate and 15-30 parts of silica sol. The water, the binder, the flame retardant, the charring ag