At present, metal gallium is a by-product of alumina production, and the micro-dispersed gallium is enriched and recovered from the seed mother liquor of alumina produced by Bayer process by resin adsorption method. The method is simple and has no special requirements for industrial production. The extraction has no other influence on the mother liquor except for the gallium element, and the returned mother liquor does not adversely affect the alumina production, and at the same time, the purity of the alumina is increased. Suzhou Bojie Resin provides recycled gallium resin with large adsorption capacity, high mechanical strength and convenient regeneration. It can effectively enrich and recover gallium in the mother liquor, thus improving the purity of alumina.