Arthroscopic reconstruction of the anterior cruciate ligament (ACL) is a routine treatment, but revascularization, healing of the tendon and bone tunnels, and restoration of proprioception after ligament reconstruction are still the main factors affecting surgical efficacy, and therefore, the promotion of tendon-bone healing is one of the hotspots of the research, and the ligament remnant is not cleaned up and removed during the surgery, but preserved, which has yielded good results. The fibers and synovium of the tibial end of the anterior cruciate ligament (ACL) are the main source of blood supply to the ligament, and part of the soft tissue and synovial vessels from the infrapatellar fat pad region also provide blood supply to the ligament. If the original damaged ligament including the stump is cleaned up during ACL reconstruction, the reconstructed ACL will be completely exposed in the joint, which is not conducive to the growth of vascular nerve fibers into the grafted tendon and the process of re-vascularization, and it will affect the establishment of the reconstructed ACL’s re-blood supply; if the original damaged ligament and synovial tissue are retained, so the reconstructed ACL is wrapped around the original damaged ligament and synovial tissue, it will be conducive to the reconstruction of the ligament. If the original damaged ligament and synovial tissue are preserved, the reconstructed ACL will be encapsulated by the original damaged ligament and synovial tissue, which will be conducive to the vascularization of the reconstructed ligament.