Artificial vascular interfaces can generally be bridged through the autologous saphenous vein, which has a high degree of simulation and is suitable for severe stenosis or occlusive vascular disease. Artificial blood vessels are generally made of nylon, polyurethane, mulberry silk, polytetrafluoroethylene, tafluron, polyester and other substances for weaving and knitting, mainly used as the heart of the aortic arch of the switch, suitable for severe narrowing or occlusive vascular disease. Artificial blood vessels can be used to replace the original blood vessel function when there is embolism, damage, aging, and no way to supply blood normally, and the degree of simulation is high, and the compatibility with human blood is also relatively good. Artificial blood vessel suture connection structure is more, such as overlapping suture, isometric three fixed-point interrupted suture, spiral interrupted suture, continuous suture and so on. In the case of disconnected vessels with severe defects, the artificial vascular interface can usually be bridged through the autologous saphenous vein located in the inner thigh, which can be taken from the proximal end of the saphenous vein trunk, and the saphenous vein can be trimmed when bridging.