Low-temperature-resistant flame-retardant hot melt adhesive and preparation method thereof

A low-temperature-resistant flame-retardant hot melt adhesive is composed of the following components in parts by weight: 40-60 parts of an ethylene polymer; 5-10 parts of maleic anhydride grafted high density polyethylene; 5 to 15 parts of maleic anhydride grafted ethylene-octene copolymer; 0.5 to 2 parts of maleic anhydride grafted polyethylene wax; 0.5 to 2 parts of an antioxidant; and 15 to 38parts of a bromine-antimony synergistic flame retardant; wherein the ethylene polymer comprises one or more of EVA (Ethylene Vinyl Acetate) with a vinyl acetate content of 5-28%, EBA (Ethylene-ButylAcetate) with a butyl acrylate content of 5-30%, EMA (Ethyl Methacrylate) with a methyl acrylate content of 8-40% and EEA (Ethylene Ethyl Acrylate) with an ethyl acrylate content of 15-30%; and the bromine-antimony synergistic flame retardant is a compound of decabromodiphenyl ethane and antimonous oxide or a compound of decabromodiphenyl ethane and silane grafted surface modified antimonous oxide. The low-temperature cold