The application belongs to the field of biological
medicine, and relates to a combination of a DR5
agonist and an
immune checkpoint inhibitor for preparing a
drug for treating tumors. The application provides application of a death
receptor 5
agonist in preparation of an anti-tumor
drug in combination with one or more of a PD-1 inhibitor, a PD-L1 inhibitor, a NKG2A inhibitor and a chemotherapeutic
drug. It is found that the DR5 agonistic
antibody can further increase the single drug
efficacy of the
immune checkpoint inhibitor. On this basis, the DR5 agonistic
antibody and the
immune checkpoint inhibitor can also be combined with
chemotherapy to further improve the effect of
immunotherapy. The application can further promote the development of
immunotherapy in the field of tumor treatment, optimize the tumor treatment pattern, and is expected to be applied in the clinic to improve the tumor
treatment effect and the
survival rate of patients.