The invention relates to thioether-containing high-temperature resistant shape memory type polyamide resin and a preparation method and application thereof, and belongs to the field of polymer materials. Raw materials of the provided thioether-containing high-temperature resistant polyamide resin include a thioether-containing triamine or thioether-containing tetramine monomer, aromatic dicarbonylchloride and diamine, and include, by weight, 86.4-626 parts of the diamine, 0.1-216.4 parts of the thioether-containing triamine or thioether-containing tetramine monomer, and 203-455 parts of the aromatic dicarbonyl chloride. A branched tri-substitute or tetra-substitute structure is introduced into the molecular main chain of polyamide through a copolymerization reaction. Because of the tri-substitute or tetra-substitute branched semi-aromatic structural unit in the thioether-containing high-temperature resistant polyamide resin, the obtained resin has excellent molding and processing performance, and because of the branched structure, mechanical performance of the resin is greatly improved, and the polyamide resin is endowed with a novel highly-sensitive high-temperature shape memoryfunction.