Objective Induces the composition and evolution of phase hematoma at different times, summarizes its MRI signal characteristics, and discusses the advantages of MRI examination for cerebral hemorrhage. Methods The MRI imaging information of 48 patients with cerebral hemorrhage with complete clinical data was recorded. The hematoma was staged in detail and the hematoma composition, signal characteristics, and the evolution of the surrounding hydrosphere were analyzed during the routine and functional examination of MRI. Results Hyper acute hemorrhage (14 cases), T1WI low signal,T2WI is a high signal, The Flair signal changes to T2WI, The DWI signal is outside the mainland, SWI is extremely low signal. Acute cerebral hemorrhage (12 cases), T1WI signal to flip, T2WI is common with low signals, Flair signal changes similar to T1WI, DWI is similar to the acute phase,SWI is Low signal (low, mostly mixed signals). Sub acute cerebral hemorrhage (10 cases), Brain hematoma composition is the most complex, T1WI visible "thick ring surrounding the high signal low signal area", the characteristics of the mixed T2WI signal, common high Flair and slightly high signal,DWI and SWI signals are confounding. Chronic cerebral hemorrhage (8 cases), This phase of MRI is the most characteristic, and almost all sequences are "Central High signal and low signal ring in the edge area". Residual cavity bleeding (4 cases), within 1 year of each sequence shows irregular low signals article ring surrounding the cable sample is high,and are in low signal the 1 years later. Conclusion The hematoma evolution of the phase and the content composition is a continuous process, also is the material basis of MRI imaging, not in the same period in cerebral hemorrhage has the MRI imaging features; And surrounding edema belt have happened, spread, increase process, ease and finally dissipated.