The invention discloses a compound die device used in a
hot pressing fuel battery film
electrode, comprising a top pressing board, a top die, a positioning frame, a bottom die, a bottom pressing board, a plurality of positioning guide pillars and
catapult springs; wherein the top die comprises a top die head and a top die base. A positioning groove for
diffusion layers is arranged at the center ofthe contact surface between the top die head and the film
electrode, so as to position the first
diffusion layer of the film
electrode. The bottom die comprises a bottom die head and a bottom die base, which has the same structure as the top die; wherein the bottom die head is used to position the second
diffusion layer of the film electrode. The positioning frame is arranged between the top dieand the bottom die, a center bore in the positioning frame is used to position an
ion exchange membrane. At least two positioning guide pillars are arranged on the bottom pressing board, aligning andpositioning the top pressing board, the top die, the positioning frame, the bottom die and the bottom pressing board in order. The
catapult springs are respectively arranged between the pressing boards and the top, the bottom die, as well as between the top and the bottom die. The invention has the advantages of easy positioning and alignment, convenient, fast and energy-saving hot pressed film electrode.