Cooling jacket for hub motor and hub motor

The invention relates to the field of hub motors, in particular to a cooling jacket for a hub motor and the hub motor. The cooling jacket for the hub motor comprises a cylindrical inner cooling jacket, a cylindrical outer cooling jacket, and a plurality of intermediate gears, wherein a plurality of outer teeth distributed in a circumferential direction are arranged on the radial outer side surfaceof the cylindrical inner cooling jacket; the outer cooling jacket is arranged on the radical outer side of the inner cooling jacket in a manner that an axial direction of the outer cooling jacket isthe same as that of the inner cooking jacket, so that a cavity for allowing a cooling medium to flow is formed between the inner cooling jacket and the outer cooling jacket; a plurality of teeth distributed in the circumferential direction are arranged on the radial opposite side surfaces of the outer cooling jacket and the inner cooling water jacket; and the intermediate gears are stored in the cavity; and the gear teeth