With the improvement of people’s standard of living human aging, some bony degenerative diseases become the cause of the quality of life, among which osteoarthritis of the knee is an important cause of the quality of life of the elderly, and some people take medication for a long time causing drug hazards. For patients with fair knee mobility and no obvious inversion or valgus deformity, they can be treated conservatively with internal and external medications or intra-articular injections. For those with severe leg distortion and limited mobility, an artificial knee replacement can correct the deformity early to restore knee mobility, relieve pain, and eliminate the side effects and costs of medication. Our hospital uses the osteotomy pad method to reduce the amount of osteotomy in the knee joint to perform various knee replacements, effectively preserving the patient’s own bone mass, improving knee mobility and relieving pain significantly, and reducing the occurrence of late complications.