The present invention discloses an antibiotic-free fermentation feed production line technology and belongs to the technical field of feed production. After fermentation of an existing fermentation feed is completed, produced products are fewer in types, thus commercial value is reduced, the fermentation times are less, the fermentation is not uniform, so that the produced fermentation feed is notgood in use effects, besides, the existing fermentation feed is relatively complicated in the technology in production engineering, and work efficiency is reduced. Lactic acid bacteria, yeasts and bacillus subtilis are mixed and stirred at 2:1:1, then fermentation micro-organisms A are mixed using a packing auger mixer, the mixture is divided into fermentation micro-organisms E and fermentation micro-organisms F, fermentation micro-organisms B, the fermentation micro-organisms E and the fermentation micro-organisms F are respectively dried and vacuumed to obtain four products of a solid mixedmicro-organism agent, a liquid mixed micro-organism agent, a semi-dry fermentation feed and a whole dry fermentation feed, so that the types of the produced products are more, the commercial value isimproved, besides, a variety of devices are assisted, and thus the technology is easier.