PROBLEM TO BE SOLVED: To rapidly manufacture mixed feed with a blending ratio desired by each stock farm in manufacturing in a TMR center many kinds of mixed feed for a plurality of stock farms and provide system for manufacturing mixed feed, the system enabling improvement of quality of mixed feed to be manufactured.SOLUTION: System 10 for manufacturing TMR (total mixed ration) by blending concentrated feed, special feed and the like with fermented roughage comprises: feed blending means 14 to which fermented roughage, and concentrated feed, special feed and the like are charged; roughage weighing means 13 which weighs fermented roughage and charges it to the feed blending means; special feeds storing part 16 which stores each of concentrated feed, special feed and the like; special feeds supply means 18 which weighs stored concentrated feed, special feed and the like and adds these to fermented roughage in the feed blending means 14 with a predetermined blending ratio in real-time; and compressing/deaeratin
