The patella is an important part of the knee joint and is the largest sesamoid bone in the human body. During knee extension, the patella can increase the strength of the quadriceps by about 30% through leverage, especially in the last 10° to 15° of knee extension, the role of the patella is more important. If the patella fracture is not handled properly, it will seriously affect the activity of the knee joint and even cause lifelong disability. Since patella resection can lead to permanent limitation of knee joint function, weakened knee extension strength, and quadriceps atrophy. Therefore, the integrity of the patella should be preserved as much as possible after patellar fracture, and patellar resection is not recommended. The patella and the front of the medial and lateral condyles of the femur form the patellofemoral joint. After the patellar fracture, the flatness of the joint surface should be restored as much as possible to reduce the occurrence of traumatic patellofemoral arthritis.