Cerebral infarction clot removal surgery takes about 1-3 hours, but it must also be judged according to the actual situation. In the clinic, some patients with cerebral infarcts are very simple cases in which the thrombus can be removed completely in 1-2 times, and the end blood flow is also restored relatively well, counting the overall anesthesia and the late resuscitation speaking, basically about 1 hour is enough. If the lesion of the cerebral infarction is relatively serious, or even multiple lesions, multiple thrombus retrieval is required for treatment, and the operation time will be relatively longer. In a relatively extreme case, after pulling the embolus of the brain infarction, the distal end will form a blockage again, and it may be necessary to pull the embolus again, which will increase the operation time, and it may even reach 5-6 hours. Therefore, we must make judgment according to the actual situation, and try to reduce the number of surgical embolism retrieval to protect the life of the patient.