Sports medicine is a secondary discipline of clinical medicine that studies the effects of sports on human health and applies modern technical methods and theories to study and treat sports-induced trauma and diseases to achieve maximum recovery of athletic ability and protect human health. It is very relevant to orthopedics, rehabilitation medicine, kinesiology, material science, biomechanics and endoscopic minimally invasive techniques. Joint replacement orthopedic sports medicine espouses a minimally invasive philosophy and functional restoration, both in arthroscopy and in joint replacement. Artificial total knee replacement surgery is carried out with increasing popularity, however, with the advancement of materials and technology, for the treatment of some special cases, unicondylar (unicompartmental) replacement is popular internationally to obtain shorter operation time, less trauma, faster recovery, and to provide new methods for some osteoarthritis, repair after total meniscectomy, etc. However, unicondylar replacement surgery must comply with strict indications in patient selection in order to obtain good results.