Objective To explore the diagnosis,treatment and pathology of malignant brain tumor in children.Methods The clinical data of 61 children with malignant brain tumor were reviewed,including their age distribution,diagnosis,operation route(according to the position of the brain tumors),chemotherapy [using bischloro-nitrosourea(BCNU),teniposide(VM-26) and temozolomide]and radiotherapy (part and whole brain irradiation,three diamensions conformal therapy,gamma knife and X-kinfe).Results Of 61 cases,which including 37 boys and 24 girls whose mean age was 11.3 years,24 cases were supratentorial tumors and 37 cases were infratentorial.Forty-five tumors received total or subtotal recession,10 cases with major recession,and 6 cases with partial recession.After operation,39 cases (63.9%) received radiotherapy,and 29 cases (47.5%) with chemotherapy.Follow-up of 49 cases were achieved,in which 22 cases died and 27 cases survived.Conclusions Surgical removal is still the chief treatment for malignant brain tumor in children.The exairesis profect should be formulated according to the specificity of each case.Radiotherapymethods should be related to post-operational images(CT or MRI).And it was different from the brain tumors in adult.It is good to prolong survival duration for some chosen cases with optimal chemotherapy.