Allograft meniscus transplantation is required if the meniscus is completely detached or if the crushing injury is very severe, or if the meniscus is completely unusable due to other infections. In most cases, meniscal injuries can be treated conservatively, with a small number of cases requiring intra-articular exploration through arthroscopy. Some repair or shaping is required, and in very rare cases, the meniscus needs to be replaced. Therefore, if a meniscus injury occurs, it is important to go to a regular hospital in a timely manner, complete the relevant examination, and then choose a reasonable treatment according to the severity of the injury.