A round baler with revolute steel roller was designed. Based on the structure of the machine, the operating process and structural design of the key components of the machine were described simply. The baler was composed of driven system, drafting device, pickup, feeder, bale chamber, tying mechanism, hydraulic system and bale discharger, and so on. The movement parameters for the round baler were designed and computed. The motion trajectory of the feeder was described and the characteristics of the spiral-type bale chamber were analyzed simultaneously. In order to test the reliability and adaptability of the round baler, performance experiments and production evaluation were carried out under different operation conditions. 