Thigh fracture bending, also known as thigh fracture after the existence of knee extension restrictions, need to take passive exercise as the main, active exercise as a supplement to the exercise mode. The specific ways are as follows: 1. Patients are required to maintain sufficient confidence and must not be afraid of pain and difficulties. 2. Adequate warm-up must be done before the exercise. In this case, the warm-up means applying heat or herbal fumigation to the fracture site and the knee joint. 3. After a good warm-up, the first step is to perform passive exercise. Passive exercise requires the patient’s family to help the patient move the knee passively. The patient should lie on his back, and then the family should help him to move the knee passively by flexing and extending the knee about 20 times, and then press him on the bed and slowly press downward above the knee joint. This may be painful, but as long as the doctor confirms that it is safe to do so, the patient should exercise as much as possible. The fear of pain should not lead to serious internal joint adhesions. Finally, in addition to passive exercises, patients should practice straight leg raises in bed and active knee flexion and extension exercises. During the exercise period, the patient should return to the orthopedic department for follow-up appointments to check the degree of recovery and to redirect the exercise.