For medial meniscus injury of 1~2 degrees, non-surgical treatments such as knee braking, functional exercise and medication application such as glucosamine sulfate can be used; for 3 degrees or 2 degrees, if the effect of non-surgical treatments is unsatisfactory, surgical methods such as knee arthroscopy meniscus suture and menuplasty are needed. 1. Clinically, for meniscus injury of degree 1~2, non-surgical treatment is generally adopted. Early treatment includes knee braking, knee functional exercise such as straight leg raising, etc., avoiding excessive weight bearing and stress on the knee, avoiding trauma, and medication such as glucosamine sulfate, etc., and physiotherapy such as ultrasonic wave. 2. For 3rd degree meniscus injury, 2nd degree meniscus injury can not be improved by non-surgical treatment, need to use knee arthroscopy surgical treatment, according to the specific circumstances of the clinical feasibility of menuplasty or meniscus suture surgery. After the medial meniscus injury, you need to go to the hospital in time, have an MRI examination to clarify the degree of injury, and take targeted treatment under the guidance of the doctor.