In general, normal walking will not damage your knees. However, long-term weight-bearing walking may damage the knee. Normal moderate walking on the knee joint is generally not harmful, because moderate activity can enhance the knee joint capsule and the surrounding ligaments toughness and strength, but also accelerate the blood circulation in the limbs, is conducive to the normal metabolism and metabolic waste discharge. If long-term weight-bearing walking may produce a certain degree of wear and tear on the knee cartilage, and easy to cause the internal cartilage of the knee joint, meniscus, repeated extrusion, friction, which leads to deformation of the internal cartilage of the knee joint, breakage or even peeling off, as well as meniscus damage and so on. Prolonged weight-bearing walking may also cause premature degeneration of the knee joint, leading to the occurrence of osteoarthritis. When walking for a long period of time, it is recommended to consult a doctor in time, complete the relevant examinations, and follow the doctor’s instructions for standardized treatment after a clear diagnosis. Normally, you should walk properly and pay attention to the combination of work and rest.