Abstract: Objective:To improve the CT images re-recognition on subdural hematoma at cerebral flax and tentorium of cerebellum in order to provide the reliable basis for correct clinical therapy. Methods:CT findings of 31 patients with traumatic subdural hematoma of cerebral flax and tentorium of cerebellum were analyzed retrospectively. Results:All of 31 cases were hyperdence,17 cases were cerebral flax subdural hematomas. They presented shape similitude as cerebral flax, but it was wider than normal, as the lesions presented as high density shadow with slender and sword,duramater presented straight,its external margain presented as wave or arc. Nine cases of cerebellum tentorium hematomas presented as flakes,crescent-shaped or sectors. Five cases of subdural hematomas of cerebral flax with cerebellum tentorium presented as falciform or "Y" shape. Conclusions:Subdural hematomas of cerebral flax and tentorium of cerebellum are typical subdural hematoma and characteristic features of CT,thin slice and coronal scan,MPR rebuilding, CT re-examination,can make accurate diagnosis.