It is generally believed that avulsion severed vessels cannot be used for anastomosis. However, it has been found in clinical practice that many non-excised severed fingers have varying degrees of vascular damage, and successful replantation of severed fingers has been achieved by preserving and anastomosing these vessels. The use of avulsed vessels for replantation of severed fingers not only expands the range of indications for replantation of severed fingers, but also avoids new injuries caused by the use of vascular grafts and other modalities used to address vascular defects. It also provides another attempt for in-depth study of severed finger reimplantation. The following points should be noted in the application of avulsed severed vessels in the replantation of severed fingers: 1. Since the free segment vessels on the side of the severed finger are loose and collapsed, there is no residual blood in the lumen after debridement, so they are not easy to find, and they should be carefully searched under 8-10x surgical microscope with the nerve as the marker in its intrinsic anatomical part. Sometimes, the lumen of the vessel opens up when it is flushed with heparin saline to facilitate the search. The terminal severed finger needs to be anastomosed under 16x microscope. 2.Vessels located in the soft tissue of the embedded segment may have contusions, whether the vessels in this part need to be explored should be based on the following points: with a tourniquet, if there is continuous bruising out of the proximal vascular fracture after debridement, or if there is continuous spillage of fresh blood under a loose tourniquet, exploration is not required; the observation under the operating microscope on the side of the severed finger does not require exploration if there is no obvious bleeding area around the vessel when it is free to the depth. Even when performing vascular exploration, note that it is not necessary to completely free to reveal the full length of the vessel, through a longitudinal entrance can determine the vascular damage. 3.When the free segment is long, there is no supporting protective tissue around the vessel, and at the same time there are different degrees of injury to the outer membrane of the vessel, so vasospasm is likely to occur, while the embedded segment is embedded in the injured tissue, and postoperative tissue swelling and inflammatory reaction stimulation will also have adverse effects on the vessel. Therefore, we routinely use poppy bases for intraoperative closure and local spraying around the proximal artery. Postoperatively, we routinely use “triple anti” therapy and “mannitol” dehydration therapy, and massage the severed finger at the same time. 4.Vessel damage in avulsion dissection is serious, and thrombosis is easily formed after anastomosis. Especially, it is difficult to determine the degree of intimal damage even under the microscope. Therefore, in the absence of a reliable method of intraoperative judgment, the use of avulsed vessels should be used with caution.