After a patient’s knee meniscus tear occurs, if it meets the suture conditions, it can still be recovered through treatment, but if it does not meet the suture conditions, it is difficult to recover, as follows: First, it can be recovered: after the meniscus tear occurs, after arthroscopic examination, the meniscus is found to meet the suture conditions, it can be sutured by a meniscal suture to restore the integrity and flatness of the meniscus, thus restoring the function of the meniscus. After 6-8 weeks, the meniscus will be fully restored to its pre-injury level. Second, unrecoverable: serious tear of the meniscus of the knee occurs, and after arthroscopic examination, it is found that it cannot be sutured, and only meniscal repair can be used. Therefore, the meniscal tear cannot be recovered, and the function of the meniscus will be significantly reduced, and the patient is prone to legacy joint instability, joint pain, chronic swelling, and activity limitation, and even degenerative joint changes will be significantly accelerated, and osteoarthritis will easily occur.