Pre-operative preparation 1.General treatment and related examination are shown in the examination items of thyroid tumor. 2.Conventional preoperative treatment can take thiourea drugs, generally not less than 3 months; 2-3 weeks before surgery add compound iodine solution, 10 drops each time, 3/d, after 1 week of combined treatment, stop using thiourea drugs. 3, can not tolerate conventional medication or urgent surgery, available larger doses of propranolol (insulin) for preoperative preparation, usage is 40 ~ 80mg, 1/6h, continuous 4 ~ 7d, 1-2h before surgery and then oral 1 time. However, it is best to use it in combination with compound iodine solution. Propranolol is contraindicated in patients with bronchial asthma and heart block. 4. Patients with mild hyperthyroidism (basal metabolic rate <30%, pulse rate <100/min) can also be prepared with compound iodine solution alone, 10 drops each time, 3/d, for 2-3 weeks. 5.Patients with heart failure may be considered for simultaneous administration of digitalis preparations. 6. The conditions for surgery are: the patient's pulse rate drops below 90/min after appropriate drug treatment, the basal metabolic rate drops to normal and more stable, the heart function is normal or has been compensated, the liver and kidneys are not dysfunctional, there are no other systemic active disorders, the sympathetic nervous system excitatory symptoms have been controlled, weight gain, the thyroid gland has shrunk, hardened, the tremor disappears, and the murmur is reduced. If the above conditions are met, surgery can be performed. 7. Other preoperative preparations are the same as those for major neck surgery, with 200-600 ml of blood prepared and appropriate amount of sedation.