Anterior cruciate ligament (ACL) reconstruction through arthroscopy is the most efficient and optimal treatment method of knee ACL rupture. The correct reconstruction of ACL anatomy: point, size, morphology and right way rehabilitation will help to recover ligament and knee function in the best way. Object: Evaluation of the result of ACL reconstruction through arthroscopy using autograft hamstring tendon at Nam Dinh Hospital from Feb 2009 to Dec 2012. Avaluating the results of ACL reconstruction through arthroscopy. Reviewing some problems of single bundle or couble bundle reconstruction. Result: Causing by sport accident accounted 38.09 percent, men primarily, average age 28 years old, average time of trauma 8.5 weeks. ACL rupture often goes together medial meniscus torn 42.85 percent. Diameter of hamstring is around 7 - 8 mm (66.67 percent). There are six cases with double bundle reconstruction and 15 case with single bundle reconstruction. The point length of lateral condylar and tibial mostly from 14 -18 mm (66.67 percent) is average 16.2mm. Getting hamsbing 2 sides for double bunde reconstruction, fixing lateral condylar by XO button. According to Lysholm scores avaluation after surgery: very good: 57.14 percent and Good 42.68 percent. Side - effect after surgery: one case of infection, limeted knee movement. One cace of numbness incision