The method of rehabilitation training for patella fracture is related to the treatment method, recovery time and other factors, and is based on muscle isometric contraction training and joint mobility training. 1.Plaster immobilization (1) Within 6~8 weeks after fracture: during the period of plaster immobilization, according to the fracture healing condition, weight-bearing and balance function exercises should be started gradually. The main exercise training includes ankle pump training, quadriceps muscle, coxofemoral muscle isometric training, and lateral leg raising exercises. (2) Remove the plaster ~ 3 months after the injury: under the guidance of professional doctors, you can start the knee flexion and extension exercises. Start from passive flexion and extension, and gradually transition to active flexion and extension exercises depending on the recovery situation. (3) Three months after the injury: You can perform static squatting exercises, single-leg squatting exercises, and downward exercises in front of a step. 2. Tension band fixation surgery. (1) On the day of surgery: ankle pump and isometric training of quadriceps and hamstrings can be started after awake from anesthesia. (2) Postoperative day 2: after removing the drainage strip, you can walk on the ground with the help of crutches, and start lateral leg raising, back leg raising exercises, weight-bearing and balance training, and gradually transition to removing the crutches. (3) 1 week after surgery: start knee flexion and extension exercises, gradually transition from passive movement to active movement, and gradually increase the flexion angle. (4) 6 weeks~3 months after surgery: with the increase of flexion angle, you can start to hold the knee exercises, straight leg lifting exercises, leg hooking exercises and other exercises. (5) 3 months after surgery: depending on the fracture healing, decide the training mode and intensity. For example, supine stretching, step down exercises, etc.. It is recommended that the patient under the guidance of a professional doctor to carry out treatment, make a training plan, do not blindly training, to avoid the adverse consequences.