Die for automobile radiator mainboard

The utility model relates to a die for an automobile radiator mainboard, which comprises an upper die, and a first air cylinder is embedded in the upper die. The pressing assembly is arranged, the pressing assembly descends along with the connecting plate, firstly makes contact with the automobile radiator mainboard and continues to descend along with the fact that the connecting plate is driven by the first air cylinder, a spring of the pressing assembly generates compression and resilience force, and the resilience force of the spring is used for pressing the top of the automobile radiator mainboard. In the subsequent punching process of the punch, the top of the automobile radiator mainboard is prevented from being pulled by the punch during punching, and the automobile radiator is prevented from being pulled to deform; the second air cylinders, the first connecting blocks and the calibration plates are arranged on the two sides of the lower die correspondingly, the two second air cylinders get close to ea