The patella is clinically located on the anterior aspect of the knee joint and forms the knee joint with the distal femur and proximal tibia. The upper end of the patella is connected to the quadriceps muscle group and the distal end of the patella is connected to the patellar tendon, which assists in the normal flexion and extension of the knee joint. Because the surface of the patella is relatively easy to reach under the skin, it is susceptible to patellofemoral fractures after direct external force to the knee. Patients will experience pins and needles pain in the knee area, with localized swelling and subcutaneous bruising. Most of the patellar fractures occur due to the misalignment and separation of the patellar area due to the pulling of the muscles and patellar tendon, so there is an obvious depression when the area is palpated, and some can reach the fracture end, and most of them need to take surgical treatment.