The slowing of blood flow in the middle cerebral artery indicates that there is a problem of insufficient blood supply to the brain, which is mainly caused by narrowing of the cerebral blood vessels due to atherosclerosis of the cerebral arteries, or because the blood is in a high-fat and high-viscosity state, which leads to slow blood flow. In clinical practice, it is usually caused by narrowing of the cerebral arteries, especially the root of the middle cerebral artery, which can lead to a slowing of the middle artery blood flow. This kind of report can be seen in transcranial Doppler examination, through which the patient can observe whether the blood flow velocity is increased or decreased symmetrically on both sides, so that a certain judgment can be made about cerebral arteriosclerosis, cerebral vascular stenosis or ventricular wall. In the treatment, patients should be given drugs to activate blood circulation and improve blood flow in the brain, such as ginkgo biloba type of drugs taken orally to improve circulation and symptoms.