Objectives: To survey results of surgecal treament for Myasthenia gravis by thymomectomy and identify some factors which is relative with results of thymomectomy. Methods: Cross-sectional descriptive study on 96 cases of thymoma among 233 patients with Myasthenia gravis, who were undergone thymectomy at Hospital 103, from 8/1999 to 8/2008.Results and conclusions: + Thymomectomy with acupunture: Good results 87.2% equivalent 96.4% of group of nonthymomas.