Minimally invasive ligament surgery is mainly an anterior and posterior cruciate ligament reconstruction under knee arthroscopy. The surgical approach of anterior and posterior cruciate ligament reconstruction under knee arthroscopy is mainly an arthroscopic autologous tendon retrieval followed by anterior cruciate ligament reconstruction. The procedure involves making two 0.5 cm keyhole-sized incisions at the knee eyes on both sides of the knee joint and observing the anterior and posterior cruciate ligaments by placing the arthroscope into the joint. If ligament damage is found, the stumps are cleaned and then the autologous tendons, mainly the semitendinosus and semimembranosus carriers, are taken at the goose foot. After removing the tendons, the femoral and tibial tunnels are positioned and drilled at the in vitro border according to the thickness of the lesion, and then the grafts are fixed in the knee joint with tabbed plates and compression screws, and the knee joint is moved through the arthroscope while observing whether the grafted ligaments are firmly fixed.