The 8-year-old boy’s patella fracture is treated conservatively with a cast, and the cast can usually be removed in about a month for knee bending exercises. However, due to the different conditions of each person, the specific situation is different, bending time varies from person to person. 8-year-old boy with patella fracture, if the film shows that the fracture is not displaced or comminuted fracture, you can use a plaster cast for fixation. 8-year-old children after fracture healing ability is strong, usually about a month after the fracture site will have fibrous scab formation fracture, more stable, at this time in the film to confirm that the plaster cast can be removed under the guidance of the doctor to carry out knee bending exercise. If the knee joint is immobilized for a long time, it will become stiff and difficult to bend. At the beginning of the exercise, we should pay attention to not use violence, but to do slow bending, step by step, to prevent the fracture from being displaced again due to violence. Eight-year-old boy with patella fracture suggests that the patient go to the hospital for medical examination, improve the examination and receive regular treatment.