The gripper chain for agricultural machinery is a chain used for clamping and conveying crop stalks on agricultural machinery such as automatic threshing machines and semi feed grain harvesters. Therefore, this type of chain is also known as the agricultural machinery feeding chain, thresher chain, and the clamping chain is divided into a chain structure without a sleeve and an inner chain structure with a sleeve chain. Clamping chains are widely used in rice harvesters. The basic structure of the chain is similar to that of sleeve roller chains. Its characteristics are that the chain plate is high pointed and toothed, and the inner width of the inner section is large to increase the width and firmness of the clamping. During operation, the clamping chain and guide rails jointly form a support and clamping for the crop stalks, and rely on the operation of the chain to achieve the goal of uniform transportation