The OLIF cage is desgned with anatomical structure, large central window, pyramidal teeth, three lordotic angles, and could meet the special requirements of lumbar oblique lateral interbody fusion, focusing on curing degenerative disc diseases and spinal instabilities, revision procedures for post-discectomy syndrome, pseudoarthrosis or failed spondylodesis, degenerative spondylolisthesis, spondylolytic spondylolisthesis and so on.