Recovery time after posterior cruciate ligament rupture of the knee is determined by the severity of the injury as well as the patient’s individual recovery, and in general 3 to 4 weeks for basic recovery. If the patient’s injury is more serious or recovery is poor, the recovery time needs to be extended appropriately. 1. The posterior cruciate ligament of the knee is an important ligament that maintains the stability of the knee joint in sports. Violence from the upper end of the tibia in the flexed position backward and knee hyperextension violence can cause injury, usually caused by excessive or sudden strenuous exercise. 2. If the injury of posterior cruciate ligament of the knee joint is mild, it can be basically recovered in 3~4 weeks under the guidance of doctor and sports rehabilitation. 3. If the ligament is completely ruptured, minimally invasive surgery for posterior cruciate ligament reconstruction is required, and the recovery time after surgery is about 3 months. When the patient has a rupture of the posterior cruciate ligament of the knee joint, he should seek medical treatment in time for targeted treatment.