<正> The efficiency of different peptide coupling reagents, including carbodiimides, HOBt or HOAt-derived uronium, phosphoni-um and immonium salts, halouronium, halophosphonium, 2-halopyridinium and 2-halothiazoliuim salts, was evaluated. The synthetic strategy for coded peptides andnonribosomal peptides was discussed with an emphasis on the rational selection of peptide coupling reagents.