For patients with cartilage injuries, there are acute and chronic injuries. In acute cartilage injuries, the first step is to rest, immobilize in a cast or brace, and apply relative braking to help repair the injury. For chronic cartilage injury, it may be relatively more complicated. Because the cartilage is difficult to regenerate, especially the defect area is relatively large, may be more difficult to repair, generally can take the following approaches to deal with: 1, minimally invasive surgical treatment: can be dealt with through minimally invasive methods, now commonly used treatment is arthroscopic cleaning; 2, microfracture surgery; 3, osteochondral transplantation: that is, the good parts of other places moved to the relatively important parts, in order to repair the cartilage defects in the area, so as to restore the function of the joint; 4, osteochondral transplantation: that is, the good parts of other places moved to the relatively important parts, in order to repair the cartilage defects in the area, so as to restore the function of the joint. To restore the function of the joint; 4, cartilage cell culture transplantation: This method is a relatively new technology now, which is to take a small amount of autologous cartilage, take it to the laboratory to do the culture, put it on the scaffold after the culture, and then plant it back to the cartilage defect area. After a period of rehabilitation and functional exercise, the cartilage can repair the normal form and function.