The mechanism of cerebral infarction is the interruption of blood flow, brain tissue damage due to ischemia and hypoxia, which will inevitably lead to necrosis after a certain period of time. Therefore, the key to treating cerebral infarction is to reopen blood vessels and restore blood flow, which requires drug thrombolysis or mechanical thrombolysis. However, not all patients are suitable for thrombolysis or thrombolysis, because there is also a time window problem, that is, within six hours of the onset of drug thrombolysis or mechanical thrombolysis has the best effect and the lowest risk, so it is called cerebral infarction “emergency golden six hours”. According to the statistics of large number of cases abroad: patients who have thrombolysis or thrombus extraction within six hours of the onset of cerebral infarction, the overall mortality rate is reduced by 4 times, and the disability rate is reduced by 4.4 times; while the risk of cerebral hemorrhage is increased by 8%, of which 2% of them are aggravated or die. The risk to the patient is far less than the risk of the natural course of the disease itself. Also, even in patients with an onset of six hours or less, the earlier the treatment, the better the outcome and the lower the risk, so the treatment of cerebral infarction must be a race against time, and time is of the essence. In patients with an onset of more than six hours, the risk of cerebral hemorrhage complicating mechanical retrieval of the thrombus increases year-on-year as time goes on. However, in recent years, the interventional devices have improved greatly, stent thrombolysis, special catheter thrombolysis and other means are becoming more and more mature, for more than six hours or even three days of the onset of the patient, especially the condition is very dangerous, the degree of disability is expected to be more serious, in the case of informed consent of the patient or the client, mechanical thrombolysis can also be carried out, which not only greatly reduce the mortality rate of the patient, but also reduces the rate of disability, and improves the quality of life.