The examination methods of meniscus injury include the following: First, physical examination is an important method for the examination of meniscus injury. Physical examination includes the Macroscopic sign as well as the meniscus gyratory squeeze and the squat test of the meniscus. These methods are good for the examination of meniscus injury, especially for the examination of posterior meniscus horn tears have a vital role. For anterior meniscus horn injury, the hyperextension test of the knee joint can be used to investigate and diagnose. Second, the examination of meniscal injury can also be examined by MRI of the joint. MRI can well show the degree and type of injury of the meniscus, which is valuable for the diagnosis of meniscal injury and is a minimally invasive diagnostic method. Third, arthroscopic exploration, arthroscopy can look at the extent and type of meniscal injury under direct vision. This method can be used for patients whose meniscus injury is not easily diagnosed.