Thyroid cancer is the most common endocrine malignant tumor. Whether it is curable or not needs to be analyzed based on the pathological type, stage, treatment effect, as well as the patient’s state of mind and age. According to histological features, thyroid cancer originating from follicular cells of the thyroid gland can be divided into differentiated thyroid cancer and undifferentiated thyroid cancer, which account for more than 95% of all thyroid cancers. Differentiated thyroid cancer includes papillary thyroid cancer and follicular thyroid cancer, which are usually curable. On the contrary, undifferentiated thyroid cancer is aggressive and has a very poor prognosis. In recent years, the incidence of thyroid cancer has been increasing year by year. Age is an important factor affecting thyroid cancer, and patients older than 45 years have a poorer prognosis. Thyroid cancer is mostly seen in women, but male patients have a poorer prognosis. 1.Papillary thyroid cancer: It accounts for about 70%-90% of all thyroid cancers. This type is well differentiated and less malignant, so the prognosis is generally better. The prognosis for women is generally better than that for men, but there is no significant difference. Moreover, the younger the age, the better the prognosis. The 10-year survival rate after surgery is nearly 90%. Follicular carcinoma: Its incidence rate is lower than papillary carcinoma, accounting for 10%-15% of thyroid cancer. Its malignant degree is between papillary carcinoma and undifferentiated carcinoma, and lymph node metastasis rarely occurs, but bloodstream metastasis is more likely to occur. Although the prognosis is worse than papillary carcinoma, it is still very good, and the survival rate can reach 70% to 80% in 10 years. Undifferentiated carcinoma: The proportion of undifferentiated carcinoma in thyroid cancer is relatively small, accounting for 3%-8%. The disease is difficult to control and can be operated at very early stage, but most patients have lost the opportunity of active treatment by the time they are diagnosed. Therefore, the prognosis is poor and most patients die within one year. Medullary carcinoma: It is a moderate malignant tumor that can occur at any age, with high mortality and poor prognosis. In conclusion, although the incidence of thyroid cancer is gradually increasing, its mortality rate shows a decreasing trend. Most differentiated thyroid cancers are curable.