The invention relates to a pig epimedium herb granule preparation process, belongs to the technical field of veterinary traditional Chinese medicinal preparations, and aims to provide a preparation process for pig epimedium herb granules. According to the preparation process for the pig epimedium herb granules, the content of icariine in the epimedium herb can be remarkably improved so as to enhance the efficacies and effects of the epimedium herb. The preparation method comprises the following steps: adding 8 times of water into epimedium herb and decocting twice; soaking the epimedium herb for one hour by warm water at the temperature of 60 DEG C before the epimedium herb is decocted for the first time, and then heating and extracting; continuously detecting for one hour when the heating temperature reaches 100 DEG C, decocting twice according to the method, and merging filtrates; concentrating the filtrate to the relative density of 1.02 to 1.05; adding 95 percent ethyl alcohol to enable the alcohol content to reach 70 percent; standing and precipitating for 24 hours, centrifuging, placing precipitate into a drying oven, and performing vacuum drying at 60 DEG C; adding a dried material into chlorosulfonic acid-pyridine solution; adding ice to terminate a reaction after an oscillating reaction is performed for two hours at 75 DEG C; regulating the pH value to be 6.8 to 7.0 by using saturated sodium hydroxide solution; dialyzing for 48 hours with purified water; finally, concentrating an extracting solution to the relative density of 1.05 to 1.1 to obtain epimedium herb extractum, adding saccharose and dextrin which are in the ratio of 3:1 (screening through a 80-mesh sieve), mixing uniformly, preparing a soft material, extruding, granulating, drying, sizing the granules, and screening the granules through a 12-mesh sieve to obtain the pig epimedium herb granules.