A method for preparing granulated creep feed, the method including: 1) uniformly mixing 100 parts by weight of a powder material with between 24 and 30 parts by weight of water to yield a mixture 2)heating the mixture at a first heating stage to a first temperature of 45-60° C., and maintaining the first temperature for 25-30 s heating the mixture at a second heating stage to a second temperature of 65-90° C., and maintaining the second temperature for 20-25 s and heating the mixture at a third heating stage to a third temperature of 95-120° C., and maintaining the third temperature for 15-20 s to yield an aged material and 3) extruding the aged material into strips by an extruding device, cutting the strips into granules, and dispersing and cooling the granules.