Foamable hot melt adhesive composition

The invention discloses a foamable hot melt adhesive composition which is prepared from the following raw materials in parts by weight: 100-106 parts of high-density polyethylene, 2-3 parts of calcium aluminate, 1-2 parts of ash-calcium powder, 1-2 parts of hexadecyl trimethyl ammonium bromide, 1-2 parts of 2,6-butylated hydroxytoluene, 4-6 parts of polyamide wax fine powder, 6-10 parts of butyl benzyl phthalate, 0.3-0.5 part of diazolidinyl urea, 1-2 parts of sodium polyacrylate, 1-3 parts of an AC foaming agent, 10-14 parts of polymethyl methacrylate n-butyl acrylate and 10-16 parts of a tackifier. The hot melt adhesive disclosed by the invention is high in adhesiveness to an aluminum plate; and a produced aluminum plastic plate has the characteristics of low density, high flame retardancy, heat preservation, sound insulation and good heat insulation effect.