Objective To study the therapeutic characteristics and experience about the endovascular treatment of basilar artery (BA) trunk and branch aneurysms.Methods Subjects included 14 patients with BA trunk and branch aneurysms,including 7 patients with associated other diseases.12 berry aneurysms were given endovascular coil embolization,together with stent or balloon assistance when necessary,meanwhile 2 dissecting and fusiform aneurysms were given parent artery occlusion.Associated diseases were managed intraoperatively,or in the second stage,or treated with gamma knife radiotherapy,or followed up.Results The follow-up period was from 1 to 2 years.Two patients with unsuccessful embolization died of re-rupture at the follow-up.The remaining 12 patients reported good outcomes and experienced no re-rupture of both the aneurysm or associated disease.Angiographic follow-ups were conducted for the 12 patients.Digital subtraction angiography ( DSA ) examination at the last follow-up showed no recurrence of the BA trunk and branch aneurysms.Conclusions BA trunk and branch aneurysms should be actively managed via endovascular techniques to prevent serious consequences due to aneurysm rupture and bleeding.Favorable outcomes can be obtained by the proper selection of endovascular treatment regimens.