The patient was 69 years old and had recurrent bilateral knee pain and impaired movement for more than 10 years. The patient was diagnosed with osteoarthritis of both knees, and the condition was serious, and the articular cartilage was very worn out. After completing all the examinations and excluding the contraindications for surgery, he underwent the “artificial joint surface replacement surgery of both knees”. The surgery went smoothly and the post-operative photos are as follows: At present, the patient is recovering satisfactorily after the surgery, no longer suffering from pain in both knees, able to walk normally and go up and down stairs, and no longer having “O” shaped legs in both knees, the photos are as follows.