Since the advent of insulin in 1920, peptide drugs have played an important role in medical practice; With the iteration of peptide structure modification and chemical transformation methods, including the modification of peptide chain backbones, as well as the introduction of fatty acids, polyethylene glycols, protein fusion, etc. for modification and optimization, superimposed on the development of new targets, the expansion of new indications and the optimization of dosage forms, the peptide drug market space has brought new increments to the peptide drug market space, and the peptide drug market space is expected to continue to expand in the future.