According to the actual picking conditions of the ring die forming machine,considering the non-linear mechanical behavior of a large amount of contact and collision between the ring die and the pressure roller and the material,the FFlex method was used to establish the dynamic model of the flexible body,and the ring die forming machine was established. The DEM-MFBD bidirectional coupling simulation model of the ring die forming machine was established,which can make the results closer to the actual situation. Using orthogonal test,the particles pressure with the three factors of ring die speed,die roll gap and particle size were analyzed. The results show that the influence of each factor on the test index should be arranged in the order of the smallest die roll gap,particle size and ring die speed. The influence of the maximum torque of the ring die was analyzed with different parameters. The results show that when the speed of the ring die is 5~6 rad/s,the maximum torque of the ring die increases with the increase of the ring die speed,and when the ring die speed increases to 6 rad/s,the maximum torque on the ring die decreases with the increase of the ring die speed. When the particle size is 2~2.4 mm,as the particle size increases,the maximum torque of the ring die also increases. The data results obtained by the EDEM-RecurDyn coupling were imported into the Durability module for fatigue life analysis. The results show that the ring die is more likely to cause fatigue damage than the pressure roller.