Bending die capable of being replaced quickly

The utility model discloses a rapid replacement type bending die, and belongs to the technical field of bending machines. In order to solve the problem that when a bending die is replaced and installed, a certain positioning structure is lacked, so that shaking is possibly generated, clamping blocks are arranged on the left side and the right side of an installation groove, the clamping blocks are connected into clamping openings in a clamped mode, a sliding groove is formed in the outer portion of a sliding rail in a sliding mode, and when a die holder is disassembled and assembled, the die holder only needs to slide in along the sliding rail; the clamping openings in the two sides of the die holder can be easily and automatically clamped to the clamping blocks through the slopes on the clamping blocks, so that the die holder can be rapidly clamped, the problem of loosening and shaking cannot occur when the die holder is subsequently fastened, the stability during replacement is improved while rapid installa