Vasectomy is mainly applicable to patients after ureteral ligation, the precautions mainly include preoperative and postoperative precautions. 1. Preoperative precautions: Before the operation, you need to adjust your psychology, avoid anxiety, nervousness, and have a comprehensive understanding of vasectomy, so as not to have doubts about the effect of the operation or have too high expectations, and you also need to abstain from food and water before the operation. 2. Postoperative precautions: After surgery, you need to go pillow lying down for 6~8 hours, keep the incision clean and dry, do not take a bath before the incision heals, in order to prevent infection, if there is seepage or oozing blood at the incision, notify the doctor immediately. Do not eat cold, spicy and stimulating food. Avoid ejaculation and sexual intercourse for 4 weeks after surgery, and use triangular gauze to lift the scrotum for 6 weeks after surgery. Review the semen routine 6 months after surgery. When the need for vasectomy anastomosis surgery, need to be carried out in a regular hospital, you can ask the doctor about the relevant precautions, when there are uncomfortable symptoms, timely communication with the doctor, and under the guidance of the doctor to deal with.