Meniscus injury of the knee joint is a common disease of the knee joint. The meniscus is located on the tibial articular surface and has medial and lateral crescent-shaped bones. The medial meniscus is "C"-shaped, with the anterior horn attached in front of the anterior cruciate ligament attachment point, and the posterior horn attached between the tibial intercondylar eminence and the posterior cruciate ligament attachment point. The middle of its outer edge is closely connected to the medial collateral ligament. The lateral meniscus is "O"-shaped, with the anterior horn attached in front of the anterior cruciate ligament attachment point, and the posterior horn attached in front of the posterior horn of the medial meniscus. Its outer edge is not connected to the lateral collateral ligament, and its range of motion is greater than that of the medial meniscus.