The invention discloses a cylindrical body array mechanism comprising a face plate chute, a face plate fixing plate, a face plate base and a face plate rotating plate. The face plate chute is connected with the face plate base through a chute mounting board; the face plate base is further connected with the face plate fixing plate; and the face plate rotating plate is located in the face plate fixing plate. The face plate rotating plate comprises a rotating plate main board, face plate petals, workpiece partition parts, material arranging irregular boards and material disturbing convex balls; the face plate petals are evenly distributed on the rotating plate main board; and the workpiece partition parts are arranged around the rotating plate main board. According to the cylindrical body array mechanism, the factors of shapes and gravity are taken into account on the principle of treating bullet reversing, small bullet heads and large bullet tails serve as the standard of direction judging, gravity serves as power, bullets can change the direction in advance in an earlier position by utilizing the shapes, the success rate of bullet arranging is greatly increased, the bullet conveying efficiency is greatly improved, the existing face plate transmission bullet conveying efficiency is about 80/min, and the bullet conveying efficiency is improved to 200/min through the cylindrical body array mechanism.