Anterior cruciate ligament reconstruction is generally less prone to secondary ruptures. When there is a significant tear or rupture of the ACL, ligament reconstruction surgery is performed, often using autologous ligaments, allograft ligaments, etc. to maintain knee stability. After reconstruction, the knee should be braked for at least 1 month to promote ligament recovery, after which the knee can be mobilized and rehabilitation exercises can be performed to restore knee function, and secondary ruptures are generally less likely to occur after rehabilitation. If you go down to the ground or do strenuous exercise too soon after ACL reconstruction, it may lead to secondary rupture because the knee joint and muscle function have not yet recovered. In addition, allograft ligaments are more prone to rupture than autograft ligaments, and secondary ruptures are also likely to occur in athletes who require high levels of physical activity. After ACL reconstruction, standardized treatment and rehabilitation exercises should be followed to avoid the risk of secondary rupture.