CT demonstration of 4 cases of infratentorial haemangioblastoma and 2 cases of supratentorial malignant haemangiopericytoma conformed surgically and pathologically in our hospital were analyzed in this article. We think, that Infratentorial cystic haemangioblastoma has typical CT demonstrations. In general, the qualitative diagnosis of it may be achieved. CT demonstration of supratentorial malignant haemangiopericytoma is atypical, so it is difficult to differentiate from other intracranial tumors and brain abscess. In the end it is only defined by histology.