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With the success of immunosuppressive checkpoint in tumor therapy, the corresponding adverse response and drug resistance defects have been exposed. T cells and NK cells are the body's immune system of the two substantial main forces. in recent years, study of T cell checkpoints appeared a certain block, such as PD-1 the effect not benign, on the distribution of NK cell surface excitatory and inhibitory receptors under normal conditions to maintain steady, could be targeted in the tumor treatment blockade have therapeutic effect. This paper reviews the function of NK cells and the effects of corresponding receptors in various types of tumors, providing a direction for the selection of appropriate gate control sites for future treatment. [ABSTRACT FROM AUTHOR]