The success rate of replantation surgery after complete severance of the finger is relatively high, depending on the nature of the injury and the specific degree. If the cut injury is relatively neat, the success rate can generally be over 90%. However, if it is a crush injury or a serious contusion injury, the success rate is lower, and it is not even suitable for replantation surgery. First of all, it is necessary to keep the local area warm and avoid stimulation by smoking. Secondly, pay attention to the local peripheral circulation, if the local swelling is obvious, pay attention to the blockage of blood vessels, and elevate the limb appropriately to help reduce the local swelling. Finally, if there is no necrosis in the replanted finger within a week, it is generally considered successful.