〔Abstract〕 To investigate the effect of generalized joint laxity(GJL) and two types of grafts(autologous hamstring tendon and allograft tendon) on anterior cruciate ligament(ACL) reconstruction. 138 patients with ACL reconstruction were followed up for 24-36 months. Four study groups were divided according to the Beighton score and the type of graft used from 138 patients who received ACL reconstruction. Preoperative and postoperative knee joint function assessment was conducted, including KT-2000 examination, IKDC subjective score and Lysholm knee joint score. Follow-up results of 2 to 3 years after surgery showed that in patients with GJL, the efficacy of autologous hamstring tendon transplantation was worse than that of allograft tendon transplantation, and over time, patients with GJL had a worse prognosis than those without GJL, regardless of which graft was selected. As a conclusion, Allograft tendons are recommended for ACL injury patients with GJL.