Artificial knee joint replacement is a new technology developed after the successful application of artificial hip joints in recent times to treat knee diseases. The artificial knee joint is a bionic design product, which is completely based on the anatomical shape of the normal human knee joint. Mimicking the structure and movement of the human knee, the artificial knee consists of four components: the femur, the tibia, the patella and the polyethylene liner. The femur and tibia are made of a strong, wear-resistant cobalt-chromium-molybdenum alloy, which is then further processed in a complex process, and the tibia and patella pads are made of ultra-high-precision polyethylene, which is machined with high-precision CNC machines. The joint contact surface of the femoral part and the liner is so smooth that it can reach the mirror effect. This is to imitate the smooth cartilage surface in the normal human joint, so that the joint can be flexible when moving. Sometimes the patellar portion can be replaced without the patient’s own patella, which is less damaged. Knee replacement is now a relatively mature orthopedic surgery with certain procedural norms and patterns, but it still requires a high level of skill on the part of the surgeon, and the position of the artificial knee joint and the balance of the soft tissues around the joint have a certain impact on the postoperative results. The surgical procedure consists of several parts: ① Removal of diseased soft tissue, damaged articular cartilage and subchondral bone in the joint, and adaptation to the geometry of the installed artificial joint. (ii) Selection of the appropriate type of artificial joint, installation of the femoral portion, installation of the tibial portion, and fixation with bone cement. ③Install the liner, reset, and end the surgery.