With the increasing understanding of cardiovascular diseases,coronary microvascular disease(CMVD)has attracted wide attention and gradually entered the public vision.At present,the diagnostic methods and treatment standards of CMVD are still limited.Magnetocardiography(MCG),as a new,convenient and efficient inspection method,has been paid more and more attention.This article reviews the application of MCG in CMVD from the aspects of origin,diagnostic criteria of CMVD,and examination indexes,advantages of MCG.