Abstract: Objective To analyze the results of whole nervous system and posterior fossa irradiation for 29 post-oprative patients with cerebellar medulloblastoma. Methods Long term follow-up is exerted for the pathology-confirmation cerebellar medulloblastoma patients between 1996 and 2005. Tbe results is analyzed. Results 3 year and 5 year survival rate is 66.2% and 62.1% repectively. Conclusions The treatment results for the patients is satisfactory, with little side-effect. The result of surgery and the dose for the spiral could be prognostic factors.