Abstract: Objective: To investigate the clinical characteristics,diagnosis and treatment of thyroid cancer.Methods:The clinical data of 47 patients with thyroid cancer were retrospectively analysed.Results:Coincidence rate of preoperative diagnosis through ultrasonography was 53.19%.Papillary carcinoma in 39 cases,follicular carcinoma in 5 cases,medullary carcinoma in 1 case and anaplastic carcinoma in 2 cases were found.Cervical lymph node metastasis in 10 cases were found including thyroid membrane invasion in 6 cases,trachea invasion in 1 case,neck muscle in 3 cases and recurrent laryngeal nerve in 2 cases.Seven cases with nodular goiter,1 case with hyperthyroidism,2 cases with Hashimoto disease and 1 case with thyroid adenoma were detected.Coincidence rate of clinical and pathological diagnosis was 40.43%.Complication,included transient hoarseness in 3 cases and temporary convulision in 4 cases.Conclusions:The differentiated thyroid carcinoma was the main form of thyroid cancer,its clinical symptom was not specificity. Operation resection is the main method in the treatment of thyroid cancer,the choice of surgical method should be based on the nature of the lesions,staging and patient status.