Abstract: Knee osteoarthritis is a common clinical degenerative diseases,accounting for more than half of osteoarthritis.Patellofemoral osteoarthritis occupies a large proportion of knee arthritis,and also a common disease at orthopedic clinic.According to Chinese statistics (2010 census statistics),China's population was more than 1.34 billion,peoples over 60 years old was more than 167 million,it is estimated that the number of symptomatic knee osteoarthritis among the population more than 60 years of age has tens of millions of people.The high cost of treatment for osteoarthritis will bring a huge burden to the society.Therefore,in order to prevent knee osteoarthritis and improve people's health,it is significant to understand the patellofemoral arthritis for the early prevention and treatment of patellofemoral arthritis.Many scholars believe that poor patellofemoral alignment leads to patellar and femoral trochlea cartilage surface lesions,and then the emergence of various clinical symptoms.Total knee arthroplasty in the elderly patients with patellofemoral arthritis is a more appropriate treatment;total knee replacement with the application of the development of patellofemoral arthroplasty is gradually reduced.For young and early patients,with lesions limited in the patellofemoral joint,total knee replacement surgery is generally not as preferred.This paper reviews the literatures on the diagnosis and treatment of patellofemoral arthritis at home and abroad,hoping to help us research the development of the diagnosis and treatment of this disease.