The practice of brain bypass surgery must be treated according to the situation, because there are many forms of bypass surgery, such as direct bypass, indirect bypass, anterior circulation bypass and posterior circulation bypass. Generally speaking, the general procedure is to put the patient under general anesthesia, then lie on the side, remove the corresponding vessels, generally speaking, the superficial temporal artery, some may also apply the occipital artery, if it is an indirect bypass, the saphenous vein is also taken for the corresponding bypass surgery, then the scalp is cut open, the skull is seen inside, the corresponding bypass site is selected, that is, the location of the recipient vessel, and the corresponding bypass is performed. The bone flap is removed, the blood vessels are separated, and the surrounding impurities are removed. After the corresponding finishing, the corresponding cut and the outside blood supply vessels for anastomosis, generally speaking, the suture is six or eight stitches, and then under the microscope to see whether the blood flow inside the corresponding filling, if smooth, the operation can be completed, the bone flap back, muscle suture, scalp suture, basically the operation can be completed.