Cytokines are a very important substance,with two different roles in inducing disease occurrence and immune regulation.After long-term scientific research,cytokines can be divided into six categories,including chemokines,interleukins,tumor necrosis factors,colony stimulating factors,interferons and growth factors.Each class of cytokines has its own unique structure and function.This paper mainly discusses the correlation between cytokines and tumors,and mainly describes the role of cytokines in tumor pathogenesis and anti-tumor therapy.