The invention provides high-temperature-resistant acrylate rubber. The rubber adopts the following components: 30-45 parts by weight of hard monomer methyl methacrylate, 10-15 parts by weight of softmonomer n-butyl acrylate, 30-35 parts by weight of a functional monomer, 20-30 parts by weight of a filler, 10-15 parts by weight of special core-shell microspheres, 2-4 parts by weight of an initiator, 1-3 parts by weight of a vulcanizing agent, and 30-60 parts by weight of a solvent, wherein the functional monomer contains one or more selected from the group consisting of hydroxyl, carboxyl, anepoxy group, aryl and a phosphate group. According to the rubber provided by the invention, a plurality of means for improving high-temperature resistance are combined, the means cooperate with one another, so that the acrylate rubber having excellent high-temperature resistance is obtained; and the rubber can meet use requirements in the prior art.