The exercise methods at home are: 1, sitting by the bed, the cushion behind the knees falling steadily, and don't leave it empty. Others should grasp the strength and slowly descend to leg press (that is, bend their knees). Never use violence, the angle and intensity should be gradual, or put an appropriate weight on the instep, such as a pillow, bend your knees, straighten your knees, straighten your knees. 2, lying flat on the bed, the affected limb is straight and vertical to the bed surface, and you can bend your knees and straighten the cycle by yourself or others. Stand by and get out of bed, hold the edge of the bed and kneel down. It is particularly important to emphasize that 1, the intensity should be gradual, and violence should not be used. 2, others help that is called passive training, can only exercise joint mobility, can not exercise muscle strength, so in the end, we should take the initiative to exercise, the two should cooperate. 3. There will be pain in the early stage of exercise. You can take some painkillers to relieve the pain and increase the confidence of patients to continue exercising. 4. Don't ask too much for the effect of exercise, that is, don't expect 3-4 days, but you can't be passive on this ground. Finally, I strongly recommend that you go to the hospital rehabilitation department to use CPM machine to assist exercise. At least exercise your joints first, and then exercise by yourself will get twice the result with half the effort, reducing pain and secondary injuries. Because it has been more than five months since the operation, if you don't take the time to exercise, I'm afraid the joint function will be affected in the future. For joints, rigid joints are useless, then your operation will fail by half, and the loss of joint function means that this leg is useless and people will be normal. Knee flexion must reach at least 1 10 degrees to meet people's normal life needs. The treatment principle of orthopedics is reduction, fixation and functional exercise, which are indispensable. I hope my suggestion is useful.