Hub casting die

The invention discloses a hub casting die. The hub casting die comprises an upper die, a side die and a lower die, and the upper die, the side die and the lower die are combined to form a hub casting cavity. The upper die in a split structure consists of an upper die ring and an upper die modeling block connected with the lower end of the upper die ring, simultaneous standard machining of accessories of the die is realized, only the upper die modeling block and/or the lower die need to be replaced when hub types change, and only the upper die ring and the side die need to be replaced when rim widths of the hubs change, so that a traditional method of making a new die for each type of new products is effectively changed, idle die amount and capital input are greatly reduced for enterprises, and utilization rate of die accessories is effectively increased. In addition, workload and cost for development of new dies are greatly reduced, and die development schedule is accelerated while new product launch time is shortened.