With the improvement of people’s living standards and the development of national fitness campaigns, more and more people are involved in amateur sports activities, thus leading to a substantial increase in the number of patients with sports injuries, but people’s knowledge of sports injuries is lagging behind, and many patients do not seek treatment until the late stage of the disease, missing the best time for treatment, and the treatment effect is not ideal. This is especially true for structurally complex knee injuries. Usually patients with knee injuries attach great importance to fractures, so the misdiagnosis and underdiagnosis rate of knee fractures is also very low, and general radiographs can basically be ruled out. However, soft tissue injuries other than fractures are not taken seriously and are considered to be general strains of the muscles and ligaments that can be healed with a few days of rest, so they rarely go to the hospital for examination and even fewer go to a joint specialist. The knee joint is one of the largest weight-bearing joints in the body, and it is the joint with the most movement and the heaviest burden. Any activity requires a high degree of flexibility and maximum strength of the knee joint, and the knee joint itself has long up and down levers, few surrounding muscles, and a complex structure, so there are more sports injuries than any other joint, and more serious injuries. The trauma is more complex in structure, such as ligament rupture, meniscus injury, dislocation, etc. Chronic strain injuries are even more frequent, such as chondromalacia patella and other joint soft tissue injuries, bursitis, knee extension fasciitis, peritendinitis, etc. In addition to accidents such as car accidents, knee trauma is mainly sports trauma. With the popularity of national fitness sports, the number of patients with knee sports injuries has increased significantly, with basketball, soccer, volleyball, jumping items having the most injuries; followed by running, skating, throwing, etc. As the injury not only affects the patient’s athletic ability and life, but also accelerates the degeneration of the knee joint in serious cases, and even causes disability. Therefore, we should not take lightly the so-called “sprain”, sometimes it brings more serious and lasting pain and consequences than fractures. The knee joint is a weight-bearing joint of the lower extremity, and the stability of the joint is particularly important for the knee. In addition to the skeletal morphology, the stability of the knee is maintained by the ligaments and tendons of the knee joint. Articular cartilage damage is the final pathological process of all knee injury complications, which means that all injuries such as ligament injury, meniscus injury, and traumatic synovitis are not effectively treated and eventually lead to degeneration of articular cartilage damage. Articular cartilage is a very valuable tissue, and its ability to repair itself after injury is very poor, so the treatment of cartilage injury is currently a difficult point in orthopedic clinical medicine. As cartilage damage worsens, the knee joint will begin to experience recurrent pain, swelling, and limited motion, and the knee joint will age prematurely, significantly limiting the patient’s quality of life and level of exercise to the late stages of osteoarthritis of the knee joint. Replacement. However, due to the complex structure of the knee injury, it often requires specialized orthopaedic surgeons and modern, more sophisticated tests to make a definitive diagnosis, so many patients are still not receiving effective treatment.