The influence of PAAC template on the structure of resulting copolymers from the acrylamide (AM)/ acrylic acide (AA)/polyallylammonium chloride (PAAC) template copolymerization aqueous system was studied by IR．1H-NMR and 13C-NMR．It was found that the template of thistype had a great effect onthe sequence distribution and molecular weight of copolymer P(AM/AA)．As the pre-assembly of AA monomers onto the PAAC template

copolymers from the template system exhibited significantly longer AA and AM sequences compared with those of copolymers from non-template systems This block-like structure was further verified by dissociation constant (pK'a) measurements．In addition the iniluence of PAAC molecular weight．molar ratio of template to monomer AA and molar ratio of AM to AA was also studied．It should be noted that the copolymer product after separation contained a small amount of bended template.