Objective To investigate the clinical effect of arthroscopic anterior cruciate ligament (ACL) reconstruction. Methods 80 patients with ACL injury in our hospital from March 2018 to March 2020 were selected as the research objects. According to the different surgical methods, patients underwent the traditional open surgery for cruciate ligament injury reconstruction treatment were selected as the control group,patients underwent arthroscopic anterior cruciate ligament injury reconstruction treatment were as the study group, 40 patients in each group, the treatment effect of the two groups were compared. Results The Lysholm score (71.8±12.6) and and Lysholm instability score (13.2±1.6) of the control group were lower than those of the study group (83.9±12.9 and 19.3±2.3), the differences were statistically significant (P <0.05). In the postoperative pain score, the study group (3.35±0.23) data was better than the control group (4.35±1.69), the difference was statistically significant (P <0.05). The incidence of complications in the study group was only 2.5%, and that in the control group was 17.5%, which was significantly lower than the control group, and the difference was statistically significant (χ²= 5.178, P= 0.023). Conclusion Arthroscopic anterior cruciate ligament reconstruction can effectively improve the activity and stability of knee joint, effectively reduce the pain of patients, reduce the occurrence of complications, and promote the rehabilitation of knee joint function. Arthroscopic anterior cruciate ligament reconstruction has the value of clinical promotion and adoption.