The invention belongs to the field of fodder processing and relates to laying hen fodder and a preparing method thereof. The laying hen fodder is prepared from, by weight, 50-60 parts of corn, 10-15 parts of fermented soybean meal, 10-12 parts of bran, 8-10 parts of core straw powder, 5-7 parts of champignon, 3-5 parts of fish meal, 3-5 parts of vinasse, 3-5 parts of radix isatidis, 2-3 parts of grape seed, 2-3 parts of allicin, 2-3 parts of boxthorn leaf, 0.5-0.6 part of salt, 0.1-0.2 part of grape seed oil and 4-5 parts of pig bone. According to the laying hen fodder and the preparing method thereof, nutrition is matched in balance, the egg yield of laying hens is improved, no additive is added in the fodder, the fodder is environmentally friendly and safe to eat, fodder ingredients are rich in various Chinese herbal medicine ingredients, the immunity of the laying hens is enhanced, the morbidity of the laying hens is greatly reduced, drugs used in disease control over the laying hens are reduced, the feeding cost of feeding households is reduced, and meanwhile the egg quality is improved.