A kind of PDL-1 antibody, its medical composition and its use

A kind of monoclonal antibody or its antigen-binding fragment being directed to 1 ligand of programmed cell death factors (PDL 1) is provided, which specific can be combined with PDL 1, inhibition of the PDL 1 to immunity of organism be released, to activated T lymphocytes.Additionally provide the pharmaceutical composition and purposes for including the monoclonal antibody.