The invention discloses an automobile foaming sound insulation mat hydraulic formwork with a long service life. The automobile foaming sound insulation mat hydraulic formwork with the long service life comprises a machine body. A hydraulic rod is fixedly connected with the top of an inner cavity of the machine body and a lifting plate is fixedly connected with the bottom of the hydraulic rod. An upper mold plate is fixedly connected with the bottom of the lifting plate and a heating block is arranged in an inner cavity of the upper mold plate. According to the automobile foaming sound insulation mat hydraulic formwork with the long service life, through arrangement of the hydraulic rod, the lifting plate, the upper mold plate, the heating block, a sliding rod, a mounting seat and a lower mold plate, a sound insulation mat formwork device is constructed which can ascend and descend for machining; through the arrangement of through holes, clamping grooves, clamping rods, handles, slidinggrooves, sliding blocks and springs, a clamping structure capable of disassembling the lower mold plate conveniently is constructed together. Cooperation of the structures achieves purposes that cleaning and maintenance are simple, destroy is not liable to occur, and production efficiency of sound insulation mats is enhanced, and solves the problems that the cleaning and maintenance are difficult, destroy is liable to occur, and the production efficiency of sound insulation mats cannot be enhanced.