After the knee meniscus injury, the first thing you should do is to brake and rest, and after the acute period, you can start to exercise moderately. Meniscus injury refers to a series of clinical symptoms produced when the integrity and continuity of meniscus is damaged under different triggers in knee joint. The main manifestation of the affected limb pain, swelling and joint interlocking and other symptoms. When acute injury occurs, activities should be stopped immediately, rest in place, apply ice as soon as possible, elevate the affected limb, use gauze pressure bandage, and promptly send to the hospital. If conservative treatment should be in the acute period of rest and braking, supplemented by knee support, after the acute period of feasible rehabilitation exercises such as ankle pumping exercise, straight leg elevation exercise, flexion and extension of the knee joint. If performed within two weeks after surgery, passive full knee extension is emphasized, and knee flexion reaches 90 degrees. And quadriceps muscle strength exercise can be carried out to prevent muscle atrophy. It is recommended that patients seek timely medical treatment and perform rehabilitation exercises under the guidance of doctors.