The recovery time of knee meniscus injury is mainly determined by the injury site and the severity of the injury, which cannot be generalized, about 4 weeks in mild cases and may take about 3 months in severe cases. If the meniscus injury occurs in the red zone of the meniscus, it is only a simple tear, after the injury, timely braking, fixation, generally about 4 weeks can be healed, about 6 weeks can be normal weight walking down. If the meniscus injury occurs in the white zone and is a serious injury such as a compound tear or longitudinal tear, without timely treatment and braking, you may need to undergo arthroscopic surgery and postoperative plaster treatment for about 1 month. After a knee injury, you should go to the hospital in time to clarify whether there is a meniscus injury, and you need to brake immediately after the knee injury to avoid aggravating the injury and causing the condition to worsen.