If the postoperative pathology suggests that the number of lymph node metastases in the neck is high or the local invasion of the thyroid cancer lesion is found intraoperatively, which cannot be removed by the naked eye, iodine-131 therapy can be performed after surgery. Iodine-131 therapy is generally based on the total excision of the thyroid gland. A better clinical effect can be achieved through the effect of nail and focal clearance of iodine-131. The negative feedback suppression treatment with levothyroxine sodium tablets after surgery can achieve better results without easy radiotherapy, and thyroid cancer is not very sensitive to radiotherapy. Lymphoma of thyroid and undifferentiated thyroid carcinoma can sometimes develop neck compression symptoms in a short period of time. Radiotherapy may reduce the local shrinkage of the tumor and thus reduce the compression symptoms, which can be considered. Differentiated thyroid cancer can also be treated by neoadjuvant therapy or neoadjuvant chemotherapy to shrink the lesion and then further surgery can be taken, but these are currently in the research stage.