The invention provides homogeneous olaquindox granules and a preparation method thereof. The homogeneous olaquindox granules are prepared form, by weight, 2-60% of olaquindox raw materials and 40-98% of auxiliary materials; one or several of hydrogenated castor oil, hydrogenated soybean oil, stearic acid, glyceryl monostearate, solid lipid, animal wax, vegetable wax and solid-state polyethylene glycol is/are selected as the auxiliary materials. The preparation method comprises the steps that firstly, at 60-90 DEG C, the auxiliary materials are heated to be melted and stirred evenly, and then the olaquindox raw materials and the melted auxiliaries are mixed, sheared and evenly stirred to obtain mixed liquor; secondly, the mixed liquor is sprayed and condensed to be prepared into the granules, and then the homogeneous olaquindox granules are obtained. According to the homogeneous olaquindox granules and the preparation method thereof, main medicine in the homogeneous olaquindox granules is even in distribution and smooth in surface, and the fluidity and dispersity of the granules are improved; when the granules are used, the granules are easy to mix, and the problems that medicine is left and animals are poisoned due to the fact that olaquindox preparations are poor in homogeneity, the olaquindox preparations are stuck on the wall, and the olaquindox preparations are mixed unevenly when the olaquindox preparations are used.