Generally, the bone heals and returns to normal in about 3 months after the operation of comminuted fracture of the left patella, and the specific recovery situation varies from person to person due to the different physique of each person. Most of the comminuted fracture of left patella is treated by surgery, and after surgery, the fracture will be fixed by plaster or brace, after 3~6 weeks, the fracture end will gradually appear fibrous connection, and the fracture end can be gradually moved down to the ground, and the knee joint can be rehabilitated, and the bone will be healed in 3 months, and the fracture will gradually return to the health. Due to the different physical condition and degree of fracture, for patients with severe fracture accompanied by other injuries or poor physical condition, the fracture healing time may be prolonged. Patients with comminuted patella fracture should also pay attention to rest after surgery, strictly follow the doctor’s instructions for treatment and functional exercises, restore knee joint mobility as soon as possible to avoid joint adhesion, and avoid overwork to avoid affecting bone healing, and if there is any abnormality, consult the doctor in time for review.