The invention discloses a stamping device for alerter machining. The stamping device comprises an operation table, a fixed plate, a cylinder, a pressing block, a positioning plate, an adjusting plate, limiting barrels, upper die blocks and a lower die block. The stamping device is characterized in that the operation table is arranged on supports, the fixed plate is arranged on stand columns, the cylinder is arranged on the fixed plate, the pressing block is arranged on a piston rod, the positioning plate is arranged on fixing rods, the adjusting plate is arranged in a positioning groove through balls, one end of each limiting barrel is arranged on the adjusting plate, each upper die block is arranged in the corresponding limiting barrel, the lower die block is arranged on the operation table through installation bolts, and the positioning groove is formed in the lower die block. According to the stamping device for alerter machining, the limiting barrels are arranged on the adjusting plate, each upper die block is arranged in the corresponding limiting barrel, and the adjusting plate is arranged to be of the structure which can rotate in the positioning groove through the balls, so that proper stamping dies can be selected according to different stamping positions of an alerter, and the universality of the stamping device is improved.