In addition to the bony and cartilaginous structures of the knee, the rest of the tissue is soft tissue, such as skin, subcutaneous fascia, deep fascia, muscles, ligaments, tendons, bursa, and joint capsule. Soft tissue injuries in the knee are usually caused by local injuries, contusions, tears and ruptures during strenuous exercise or external impact, resulting in significant pain, swelling, and unfavorable movement. It is necessary to take a knee MRI to see the soft tissues clearly, and to take a treatment plan according to the specific damage to the soft tissues, either conservative treatment or surgical treatment measures.