Femoroacetabular impingement syndrome (FAI) is one of the common clinical painful diseases, which is caused by the ab- normal impingement between the femoral head-neck junction and the acetabular rim due to the abnormal anatomical structure. In recent years, minimally invasive surgery, especially hip arthroscopy, has developed rapidly, while the understanding of FAI has been deepening, and the concept of diagnosis and treatment has changed greatly. At present, hip arthroscopy, a minimally invasive surgery, has become the mainstream technique for the treatment of FAI with continuous improvements of the clinical follow-up results and prognosis. This article re- views the new diagnostic methods, arthroscopic treatment, efficacy and complications for femoroacetabular impingement.