Meibomian gland dysfunction(MGD)is one of the common diseases in ophthalmology clinic. The diagnosis of MGD ought to be evaluated according to symptoms, signs and corresponding assistant examinations. Traditional examination methods, such as slit-lamp examination, break-up time of tear film, Schirmer tear test and so on, have definite value in the diagnosis of MGD. In 2017, the experts on the diagnosis and treatment of Meibomian gland dysfunction in our country have reached consensus that some novel clinical examination methods such as Meibomian gland loss rate and tear film lipid layer thickness are also worked as auxiliary diagnostic criteria for MGD. The combination of traditional methods and new detection techniques will lead to more comprehensive and accurate conclusions for the diagnosis of MGD.