Chondromalacia patella, like other cartilage injuries, is a cartilage-type injury, and cartilage has little healing ability, so once damaged, it can cause permanent lesions. It is almost unlikely that it can be restored to its normal athletic state through slow exercise, but if its rehabilitation can be done, it will not affect normal life. The patella is the largest seed bone in the human body, connected between the quadriceps muscle and the patellar tendon, located in front of the knee joint, in front of the lower end of the femur. Normal patella is in the femur’s carriage this booking track activities, when the patella due to external factors lead to external displacement or patella instability, will be out of the fixed track, abnormal wear and tear, and gradually cracking, flaking, degradation, the formation of patellofemoral arthritis. Chondromalacia patella is an injury to the patellar cartilage caused by the patella being in an incorrect position during knee movement. The main idea of rehabilitation for chondromalacia patella is to restore the normal mechanism and compliance of the patellofemoral joint activity and to reduce the pressure on the patellofemoral during activities of daily living, sports and rehabilitation. To do this, is the need to pay attention to the following issues: First, enhance the stability of the knee joint, we mainly enhance the muscle strength around the knee joint. Including the strength of the gluteus, quadriceps and calf triceps. To do this, it is necessary to do calf triceps strength training. Second, correct the patella trajectory, by strengthening the muscle strength will alleviate this chronic strain injury caused by the lower limb force line misalignment, biomechanical relationship disorder. Avoid activities that can cause pain, such as strenuous activities, excessive knee bending, squatting and kneeling. Do not participate in mountain climbing, cycling and other sports activities. Quadriceps isometric contraction exercises (kneecap pumping) and physical therapy can enhance quadriceps muscle tone and local blood circulation. Oral non-steroidal anti-inflammatory and analgesic drugs and cartilage protection drugs. Reduce weight. VII. Surgical treatment is available for more serious cases. Whether it is rehabilitation training or medication or surgical treatment, it is necessary to carry out under the guidance of a professional doctor to avoid secondary injuries, affecting the normal life.