Straight knurled nut machining die

The utility model discloses a straight knurled nut machining die which comprises a lower die base and an upper die base arranged above the lower die base, mounting holes are formed in the two sides of the top wall of the lower die base, electric telescopic rods are fixedly installed on the bottom walls of the two mounting holes respectively, the tops of the two electric telescopic rods are connected with the upper die base, and the upper die base is connected with the lower die base. A plurality of pouring grooves are formed in the top wall of the lower die base, embedding blocks corresponding to the pouring grooves are arranged at the bottom of the upper die base in a protruding mode, two copper plates are embedded in the lower die base, a plurality of cooling liquid pipelines are welded to the opposite sides of the two copper plates, and the two ends of each cooling liquid pipeline are connected with an input pipe and an output pipe. A water storage tank is welded to the multiple connecting-in pipes, and an