The incidence and disability rate of knee joint fibrosis are both relatively high.In recent years,with the increasing attention of scholars in the field of sports medicine to knee joint fibrosis,its early diagnosis has become the focus of research.Currently,although there are many research models related to knee joint fibrosis,there is still no standard diagnostic protocol in clinical practice.Therefore,the authors review the latest research on risk factors and biomarkers related to early diagnosis of knee joint fibrosis,aiming to provide references and insights for early treatment strategies of knee joint fibrosis.