ACL injury is a common sports injury of the knee joint, commonly occurring when the knee joint is sprained during jumping and landing during sports, the injury can be felt as a sense of joint misalignment, and sometimes a pop can be heard, after the injury there will be obvious joint swelling due to intra-articular bleeding, according to statistics, knee sprain with intra-articular hematoma, the incidence of ACL injury can be as high as 70%. After the injury, the patient has limited joint movement and difficulty walking. If we use four key words to summarize the clinical manifestations of ACL injury in the acute phase, it is “loud, painful, swollen, and limited”. ACL injuries may also be associated with meniscal and/or collateral ligament injuries, which may have other combined clinical manifestations. The cost of ACL arthroscopic reconstruction varies depending on the material used, whether double or single bundle reconstruction is used, for example, the cost of single bundle reconstruction with an autologous tendon is around $21,000, while with an allograft ligament it is around $35,000. These are all hospital and surgical costs.