After cerebral infarction,brain blood from blood supply arteries and collateral circulation supplies,blood supply artery stenosis degree and subsequent collateral circulation is the key factors influencing the brain blood flow dynamics.By analyzing the anatomical basis of collateral circulation,mainly the collateral anastomosis between the intracranial arteries,the collateral anastomosis between intracranial and extracranial arteries and the newborn blood vessels,to review the collateral circulation in arterial blood supply of compensatory mechanism.