The invention relates to piglet pellet feed preparation method which comprises the following steps: (1) micro pulverization and even mixing are conducted to complete feed through a conventional feed processing method; (2) the mixed complete feed micro powder is poured into an inclined rotary disk granulating machine, and vaporous adhesive nutrient broth is evenly sprayed on the complete feed micro powder in the disk granulating machine, to prepare spherical granular feed; (3) the spherical granular feed is spread on a mesh-belt drying machine, to be heated and dried; (4) the granular feed is cooled through a counterflow cooling method for conventional feed processing; the particles of the granular feed prepared by the method are more floppy and crispy; the method improves the palatability of piglets, meanwhile, improves the granulation efficiency, reduces the granulation energy consumption and saves the artificial cost of granulation.