Objective　To study the effect of modified radical orchiectomy.　Methods　The clinical data of 28 cases of adult patients of clinical stage-Ⅰseminoma from January 2009 to August 2012 were retrospectively presented and analyzed. Among 28 cases of adult patients, 13 cases were cured by modified radical orchiectomy and 15 cases were cured by radical inguinal orchiectomy. The two ways of surgery were evaluated by the surgical duration, length of incision, hospitalization length after surgery, surgical complications, and neoplasm recurrence.　Results　The modified radical orchiectomy of 13 cases of adult patients of clinical stage-Ⅰseminoma was successfully  rformed. There was not significant difference in modified radical orchiectomy and the radical inguinal orchiectomy with regard to the surgical duration, the surgical complication and the neoplasm recurrence, but the former was significantly lower than the latter in visual analogue scale(VAS), and significantly shorter in the length of incision and in hospitalization length Conclusions　The modified radical orchiectomy of the clinical stage-Ⅰseminoma is advisable and safe. To contrast with traditional radical inguinal orchiectomy, this way of surgery has the characteristics of the smaller incision and themilder pain after the surgery.