Knee surface replacement surgery is a proven method of treating serious knee disorders, relieving a large number of patients every year and enabling them to regain a quality life. The osteotomy technique is the basis for the success of the surgery. The current osteotomy technique relies on the osteotomy mold according to the empirical parameters, for example, if we take target shooting as an example, the current osteotomy technique can hit 9-10 rings each time. The answer is that it is now possible. The answer is that it is now possible, and this is called “Personalized Osteotomy Technology”. Personalized osteotomy technology is a kind of research and development based on the MRI three-dimensional imaging technology developed by experts of Ohio State University Orthopaedic Hospital in 2010 in cooperation with the American Bonne Métrieux Company, based on the patient’s individual anatomical characteristics to design and make personalized osteotomy molds, so that the doctor’s osteotomy operation is more accurate during the surgery, and the recovery of the lower limb’s force line is more satisfactory, and the surgical trauma is more smaller, and the functional recovery is more ideal after the surgery. Patients undergo outpatient MRI examination of the lower limbs, collect the data, and transmit it to the company to make osteotomy molds. During the surgery, each patient has his/her own osteotomy mold, thus achieving the ideal surgical effect. Personalized osteotomy technology takes 4 weeks to collect data from the MRI and send it to the company to make an osteotomy mold, and the cost of the surgery is about$9,000 more than that of the traditional knee joint surface replacement surgery. However, the benefits of the surgery are obvious, and with the understanding of this technology by the patients and the doctors as well as the gradual decrease in the cost of personalized osteotomy molds, it is believed that personalized osteotomy technology is the direction of the development of the future knee joint surface replacement surgery. The direction of personalized osteotomy is believed to be the future direction of knee surface replacement surgery.