Magnetic resonance imaging of cerebral hemorrhage varies with the time of onset and can show high and low signals on T1WI and T2WI sequences. Magnetic resonance examination refers to the technique of imaging by influencing hydrogen ions through a magnetic field, which is widely used in neurological examinations because of its clear imaging and lack of radioactive damage. The MRI of cerebral hemorrhage mainly depends on the T1WI and T2WI results, with the low signal being black and the high signal being white. Within 24 hours of the onset of the disease (hyperacute stage), the magnetic resonance imaging results are T1 low signal and T2 high signal; within 2-7 days of the onset of the disease (acute stage), T1 is equal signal and T2 is low signal; within 8 days to 4 weeks (subacute stage), the T1 and T2 results are high signal; after 4 weeks (chronic stage), the performance of T1 is low signal and T2 is high signal. The reading of MRI of cerebral hemorrhage needs to be analyzed in conjunction with the time of onset. In the examination of early cerebral hemorrhage, the specificity of magnetic resonance is lower than that of CT, so emergency patients with stroke symptoms are often examined by CT first to clarify whether it is cerebral hemorrhage.