The utility model discloses a shaftless screw conveyor for feed production, including frame, conveying mechanism, actuating mechanism, conveying mechanism sets up in the frame, and including the silothat can seal, the both ends of silo are provided with feed inlet and discharge gate respectively, and the silo includes the cell body of cross -section type of being U style of calligraphy and the apron that cell body top opening part set up, mutually supports with the sealant groove through apron and cell body, be equipped with the shaftless spiral assembly who follows silo length direction andarrange in the silo, this shaftless spiral assembly meets non -shaft spiral vane and shaftless spiral body including the dress, and the two parallel just hand of spiral is unanimous together, this non-shaft spiral vane's outside edge is equipped with the sawtooth, shaftless spiral assembly connects actuating mechanism is rotatory through this actuating mechanism drive, and this actuating mechanism establishes the one end of leaning on the discharge gate at the silo. The utility model discloses can effectively avoid pressing from both sides the material phenomenon, guarantee that sanitation and material do not receive the pollution, reach the clean level of food level, improve fodder product quality.