Objective: To summarize and discuss the dislocation of the knee joint caused by anterior and posterior cruciate ligament injury and reconstruction combined with rivet repair of medial collateral ligament of knee joint injury, curative effect to restore stability and function. Methods: Effect of stage I arthroswpic on 28 patients with knee joint dislocation, anterior and posterior cruciate ligament injuries and patients with secondary or complete rupture of the medial collateral ligament were retrospectively analysed. There were 22 cases of car accident injury, 4 cases of military training injury and 2 cases of plateau falling injury. The injury time was 6–17 d, with an average of 7 d. The knee joint Lysholm score was 21.7±6.52 and the International Knee Documentation Committee (IKDC) score was 17.42 ±11.56, and the range of motion of the joint was (27.2±19.6) degrees. Combined internal and external meniscus composite laceration were in 15 cases. After arthroscopic debridement, the joint cavity was combined with injury, and the autogenous semitendinosus tendon and gracilis gracilis tendon were used to reconstruct ACL, LARS ligament and PCL, and MCL was repaired with suture rivet. Results: All patients were followed up in a short time for 6 to 24 months, with an average of 18.2 months. The knee function score of Lysholm was 89.23±6.08, and the range of joint motion was 116.56°±12.8°, and the IKDC score was 88.74±4.54. The difference was statistically significant (P<0.05). Conclusion: In the treatment of multiple ligament injury caused by knee dislocation, patients were less injured by the reconstruction of ACL and PCL under one-stage arthroscopic, combined with the incision and repair the MCL tight end, and postoperative knee stability recover better. Further rehabilitation therapy may obtain significantly lower joint adhesion rate and short-term effect, which is worthy of clinical reference.