Hub casting mold and hub casting cooling process

The invention particularly relates to a hub casting mold which comprises an upper mold body, a side mold body, a lower mold body and a cooling device, the upper mold body, the side mold body and the lower mold body are assembled to form a casting cavity, a pouring gate is formed in the side mold body, and a center column protruding upwards is arranged on the lower mold body. The cooling device is used for cooling the casting cavity so as to form a hub blank in the casting cavity; the cooling device comprises a central cooling structure, a middle cooling structure and an external cooling structure, the central cooling structure comprises a central column liquid cooling cavity arranged in the central column and an annular liquid cooling cavity arranged in the upper mold, and the annular liquid cooling cavity is arranged around the central column; and the central cooling structure, the intermediate cooling structure and the external cooling structure are sequentially started during use, so that the hub blank is