There are many kinds of operations, and the hospital classifies operations from three aspects. First, according to the difficulty of the operation, it is divided into large, medium and small operations. Major surgery refers to large-scale, difficult and damaging surgery, such as tumor surgery, cardiothoracic surgery, liver resection and organ transplantation. Moderate operations such as gastrectomy, hernia repair, ovarian tumor resection, internal fixation of limb fractures, etc. Minor surgery refers to general trauma debridement, abscess incision, body surface mass resection, etc. Secondly, according to the nature of incision, it can be divided into three types: aseptic incision operation, possibly contaminated incision operation and contaminated incision operation. Third, according to the degree of emergency surgery, it can be divided into emergency surgery and elective surgery. Emergency operation refers to the operation that needs to be performed immediately; Patients undergoing elective surgery are in stable condition, so they are allowed to make full preparations and choose the best operation opportunity according to the actual situation. In order to ensure the safety of patients' operation, according to the regulations, all major operations, difficult operations, important organ resection, amputation and new operations carried out for the first time should fill in the major operation approval report and be signed by the department director. At the same time, with the consent of patients and their families, and sign the operation report, and report it to the hospital medical department for approval. This kind of operation should be discussed before operation, analyze the possible problems in the operation and put forward the treatment measures. Ask relatives or unit leaders to sign to show the necessity and significance of the operation, introduce the operation plan and the required time, and let family members know the situation; Explain to the family members the dangers of the operation and the possible accidents during the operation, so as to attract their attention; Show the attitude of both sides to the operation, get the cooperation and support of family members, and don't be intimidated by it. After all, a surgical accident is only a possibility. Before signing, family members should not only carefully consider and weigh the pros and cons, but also respect the doctor's opinion and make a correct decision. After all, doctors are experts.