#$%^&*AU2020101967A420201001.pdf#####ABSTRACT The invention discloses a combined drug preparation for treating cancer, wherein the combined drug comprises an effective amount of PD-Li antibody and pirfenidone; The pharmaceutical preparation of the invention can improve the effective rate of immunotherapy, solving the problem of the existing PD-Li antibody single drug that has poor tumor inhibition effect, and benefit more cancer patients.