In the process of playing basketball, certain sudden rotation, starting, stopping or strenuous bending and straightening activities of the knee joint may damage the meniscus. Meniscus is padded in the femur medial and lateral condyles and tibia medial and lateral condyles between the articular surface of the two semilunar fibro-cartilage plate, has stabilized the knee joint, the distribution of the knee joint load force function. If the knee joint suddenly turns, starts, stops or violently bends and straightens, it is easy for the meniscus to be strongly impacted and squeezed, which in turn causes damage to the meniscus and a tear of the meniscus. In the process of playing basketball, pay attention to the protection of the knee joint. If there is a meniscus injury, it is recommended to consult a doctor in time for examination and treatment as prescribed by the doctor.