A ligament rupture is a broken ligament, as the name implies, like a rope broken into two pieces. If the ligament is not surgically sutured back together, the ligament will not be able to retract and then lose its restraining and stabilizing effect on the joint, and the patient’s joint will become loose and unstable, and the patient will feel slippery or unstable when walking and fall down easily. Once a ligament rupture is identified and the ligament site is shown to be blurred and the signal is increased on MRI, early exploration and surgical repair is required, otherwise sequelae will be left. Some patients are unwilling to undergo surgery and the ruptured ligament is not very important, so conservative treatment methods are used, such as fixing the lateral collateral ligament injury with a cast in the valgus position and fixing the medial collateral ligament injury in the valgus position, so that the two ruptured ends are close together, and the two ends can gradually grow together.