The anterior cruciate ligament is an important structure for maintaining the anteroposterior stability of the knee joint. Reconstruction of the anterior cruciate ligament injury is broadly divided into intraarticular and extraarticular technique. Intraarticular reconstruction is a reliable method to correct the rotational axis of knee joint stability. The recent fixation technique with interference screw could avoid the additional incision on the lateral aspect of distal thigh. And the isometric point was easy to find. Authors analyzed the 18 cases who had taken the reconstruction surgery of the anterior cruciate ligament using bone-patellar tendon-bone augumented with Kennedy LAD and interference screws under arthroscopy from August 1990 to December 1991. The average follow up period was over 28.5 month. The average postoperative Lysholm's score was improved to 83 points from the preoperative score, which was 49 points. The final result was excellent in. 10 cases, good in 5 cases, fair in 2 cases and failure in 1 cases according to the Clancy evaluation. We concluded that the reconstruction of the anterior cruciate ligament using patellar tendon augumented with Kennedy LAD and the intrference screws could be an effective method in the treatment of anterior cruciate ligament insufficiency in terms of firm and isometric fixation, minimal incision and early mobilization.