The paper aims to solve the problem of poor strapping effect of stacks of paper financial products. The conveyor mechanism, product positioning and ironing mechanism, cutting mechanism, origami mechanism and scrap mechanism of the automatic strapping machine was researched in modules through design and test on this generation of structural machine and optimizing and design on the second generation of structural machine. The strapping machine could automatically realize the fixed length transmission, fixed length cutting, origami and ironing of the strapping; when a fault occurred, the offline maintenance could be realized, and the loss caused by the shutdown maintenance could be minimized. The origami position could be adaptively adjusted according to the thickness of different products to achieve the tightness of the bundled paper financial products. The practical application shows that the automatic trapping machine researched in this paper works reliably, runs well and worth popularization.