Abstract: Natural killer T （NKT） cell is a kind of important independent lymphocyte subsets. Studies have shown that it plays an important role in the process of the bodys immune response. Different NKT cells and their functions have been found and the influence of different subsets of tumor immune is not the same. The interaction mechanism between subsets is not very clear and needs further exploration. An indepth understanding of NKT cells in the tumor immune function has important significance for the treatment of tumors.

Key words: Tumor immunity, Natural killer T cells, Immune regulation