The specific time for ACL reconstruction surgery cannot be generalized, but is mostly between 1 hour and 3 hours, depending on many factors such as the skill level of the surgeon and the complexity of the surgery. If it is a simple ACL rupture that is undergoing reconstruction surgery, the surgery time is generally shorter. However, some patients may have ACL rupture combined with other ligament ruptures or injuries, or even with posterior cruciate ligament rupture at the same time, so the reconstruction surgery for these patients is usually more complicated and takes longer. In addition, the skill level of the surgeon varies from one hospital to another, and the time taken by an experienced surgeon is usually shorter. The duration of the surgery also depends on the skill of the assistants and nurses. For ACL reconstruction surgery, the length of the surgery is not directly related to the outcome of the surgery and recovery, but the most important thing is to cooperate with the surgeon proactively in order to achieve a good functional recovery.