The healing time of medial collateral ligament injury is about 1~3 months, and the recovery time is different for different degree of injury, so it should be analyzed specifically. The medial collateral ligament injury can be divided into three degrees, the milder one is the first degree, this kind of injury is usually no fibrous tear, usually pay attention to rest, can be recovered in about a month. For the second degree of injury, usually a mild tear, but not completely torn, there will be obvious mobility problems, severe pain, this situation usually need cast immobilization and rehabilitation treatment at the same time to get back, usually need about two months. For the third degree of injury, is more serious, usually a serious tear or complete tear, this case of joint stability is poor, can not walk normally, need timely surgical repair, and then plaster immobilization, after the condition is stabilized, combined with rehabilitation training therapy, it usually takes about three months to recover. After the medial collateral ligament injury should go to the hospital on time to do review, by professional doctor guidance for rehabilitation training, do not do strenuous exercise, do not over exercise, avoid affecting the recovery.