The cruciate ligaments are located in the knee cavity and are two important ligaments in the knee joint that maintain the anterior and posterior stability of the knee joint. A rupture of the cruciate ligaments can have serious consequences, including swelling, limited movement and instability of the knee joint, weakness of the knee joint when walking, inability to walk or jog, and impact when walking up and down stairs. If there is no instability in the knee joint, it can be treated conservatively with 6-8 weeks of cast or brace immobilization and then functional exercise. If the cruciate ligament is a grade III tear on MRI with knee instability, surgical treatment is required. With the development of technology, cruciate ligament rupture can be treated with minimally invasive ligament reconstruction surgery under knee arthroscopy.