Quick die changing device of cold forging punching machine

The invention relates to the technical field of die changing of punching machines, in particular to a quick die changing device of a cold forging punching machine, which comprises a base, the base is vertical and is fixedly provided with a lower die through a fastener, a sliding die changing device comprises mounting grooves, and a plurality of mounting grooves are parallelly formed in the base along the direction in which the lower die is separated from the base. A mounting plate capable of moving in the mold closing direction is movably mounted in each mounting groove, a plurality of rollers with the rotating direction tangent to the direction in which the lower mold is separated from the base are arranged on each mounting plate, and when the mounting plates are horizontally placed, the highest points of the rollers protrude out of the highest points of the side walls of the mounting plates; a lifting device used for driving the mounting plate is arranged in the base, the liftable sliding rail type sliding