Objective To investigate the imaging features of CT and MRI in hemorrhagic transformation of cerebral infarction. Methods The clinical data of 32 patients with cerebral infarction hemorrhage confirmed by surgery and pathology in our hospital between June 2013 and June 2016 were retrospectively analyzed. All patients underwent CT and MRI examination, and the imaging features were summarized. Results CT imaging features of hemorrhagic transformation of cerebral infarction: ①there was obviously patchy and high-density shadow in infarction area, edges of lesions were blur. ②lesions with more hemorrhage were crumby (irregular, with typical space-occupying features). ③lesions with little hemorrhage was often covered when undergoing CT examination. ④CT enhanced scan of infarction area showed gyriform, patchy or nodular enhancement. The lesions were central type (9 cases), peripheral type (11 cases) and mixed type (12 cases). MRI imaging features. ①in acute phase after hemorrhage, hemorrhagic lesions showed low signal on T2, slightly higher than that in patients with intracerebral hematoma. ②in subacutephase, the main imaging signal of hemorrhagic lesions was short T1 and long T2 signal. ③in chronic phase, the main imaging signal of hemorrhagic lesions was clearly visible tipical low signal formed by hemosiderosis on T2 or gradient echo image. ④MRI enhanced scan showed that there was obvious gyriform, patchy or mass like enhancement signal in infarction area. Conclusion The CT and MRI features of hemorrhagic transformation of cerebral infarction are special. Summary of the findings of the two imaging methods can provide important reference for the development of treatment plan.