Acute cerebral infarction is a disabling and fatal disease, the cause of which is atherosclerotic plaque of cerebral blood vessels and thrombosis. To address this cause, the effective method is thrombolytic therapy, the purpose of thrombolytic therapy is to make the blood vessel recanalization, there are two diagnostic criteria for the recanalization of blood vessels after thrombolytic therapy: 1, clinical criteria. 2, vascular imaging criteria. The clinical criterion is the rapid relief of clinical symptoms after the use of thrombolytic drugs, which is the clinical criterion. The vascular imaging criterion is that after the application of thrombolytic drugs, the patient’s vascular imaging, including CT angiography, nuclear magnetic angiography, or minimally invasive angiography, found that the blood vessels have been recanalized and blood flow has been restored, and this is the vascular imaging criterion.