Many sports enthusiasts choose to climb mountains as a way to exercise and receive good exercise results. However, some climbers complain of knee pain, after examination, a large part of it is caused by meniscus damage inside the knee. The knee joint is the largest of all joints and is the “main force” that bears weight. It consists of the femoral and tibial condyles, with the patella in front and the meniscus in the middle. Weight is the vertical stress on the knee joint, and complex human movements, such as turning in a ball game, or lateral stress on a downhill, can cause injury to the meniscus of the knee joint if the force is too great, especially when the rotation is too strong. The meniscus is a cartilaginous tissue with little to no blood supply, which makes it difficult to heal once injured and is the cause of post-injury joint pain. Paying attention to the protection of the knee joint when climbing can effectively reduce the probability of meniscus injury. Therefore, people should not carry too much weight when climbing, the intensity of exercise should be small and gradual, uniform speed and effort, and should take appropriate rest on the way, and timely hydration, a climbing time of half an hour to an hour is appropriate. When climbing, it is best to bring knee pads to enhance joint protection. For people who have knee problems, it is not advisable to climb a mountain with too much slope or go up and down too many steps.