Biological antibiotic-free concentrated feed for laying hens and preparation method thereof

The invention discloses a biological antibiotic-free concentrated feed for laying hens and a preparation method thereof, and belongs to the field of animal feeds. The feed is prepared from the following components: dehulled soybean meal, germ meal, corn alcohol stillage and soluble matters thereof, shell powder, dicalcium phosphate, table salt, cottonseed meal, rapeseed meal, soybean oil, choline chloride, compound premix for the laying hens, yeast cell wall polysaccharide, bacillus licheniformis, bacillus subtilis, lactobacillus acidophilus, clostridium butyricum, yeast selenium, a coated slow-release acidulant, phytase, glucanase, xylanase and cellulase. The feed disclosed by the invention solves the problems that excessive antibiotics are used for raising the laying hens, so that the normal physiologic equilibrium of intestinal tracts of poultry is broken to cause reduction of the autoimmunity and the anti-stress capacity of the laying hens.