Abstract:Objective To investigate the diagnosis and treatment of knee joint infection after anterior cruciate ligament (ACL) reconstruction under arthroscope.Methods Clinical data of 6 patients with knee infection after arthroscopic ACL reconstruction were collected from January 2015 to December 2019. Among them, 4 patients were treated with anti infective drugs, and 2 patients were treated with secondary arthroscopic debridement.Results All the patients were cured, the temperature returned to normal, the local symptoms of knee joint disappeared, and the hematological indexes returned to normal. All the patients were followed up from 6 months to 14 months with an average of 10 months. The evaluation criteria were Lysholm score of knee joint and IKDC 2000 subjective function score of knee joint suggested that the patient's knee joint function recovered well.Conclusion Patients with postoperative infection of ACL of knee need to be diagnosed as early as possible. According to the patient's history, blood test results and imaging data, we should treat them specifically and make personalized treatment options.