Abstract: Objective :To evaluate ultrasonography,FNA and intraoperative freezing section as the early-stage diagnostic and treatment means of thyroid microcarcinoma (TMC). Methods :Clinical diagnosis and therapeutic data for 34 cases of postoperated patients with TMC confirmed by pathology in the period from 1992 1998 were analyzed. Results : Diagnostic positive rates by section were 94.4%(32/34), 81.1% and 90%, respectively in 32 csesultrasonography, diagnosed preoperatively. Through postoperative pathologic exam, 34 cases were confirmed as TMC that was not discovered in 3 cases by intraoperative freezing section. Near total thyroidectomy was performed in 4 cases, obectomy of cases. lobe in 28 cases, combined with cervical lymph node dissection were adopted in 2 Follow-up rate was 88%(30/34) with time ranging from 5 years to 11 years. One casepurred on opposite side and without mortality. Conclusions :Ultrasonography in combination with anon and intraoperative freezing section will help to increase the diagnostic rate, so FNA before operit has the value of clinical use. Total or near-total lobectomy fulfils the eradication of TMC.