stimuli‐responsiveness, synthetic polypeptides have attracted more and more attention in the biomedical material field. In this work, a novel thermo‐responsive graftpolypeptide, poly(L‐glutamate)‐graft‐poly(2‐(2‐methoxyethoxy)ethyl methacrylate) (PLG‐g‐PMEO2MA), is prepared through a combination of ring‐opening polymerization and atomtransferradicalpolymerization. The structure of PLG‐g‐PMEO2MA is