The bag-feeding component is an important part of the rotary packing machine. Its composition and working principle are as shown in the figure. It is mainly composed of a drive motor, a distribution shaft, a bag feeding mechanism, a bag feeding mechanism, a clamping and lifting mechanism, a bag sweeping belt, It is composed of bag delivery belt, bag supply platform and base. The simplified model of the mechanism analysis of the bag-feeding component is shown in Figure 3. For clarity, each driving cam and the corresponding swing lever mechanism are drawn separately, and their axes correspond to the distribution axis O1 and the swing lever axis O2 respectively.