The Ti/PbO2 electrode was prepared by the thermal decomposition and electro-deposition method.The acrylamide（AM）and acrylic acid（AA）were polymerized to prepare poly（acrylamide-co-acrylic acid）on the Ti/PbO2 electrode.The reaction products and kinetics of the process were discussed.The molecular weight of the poly（acrylamide-co-acrylic acid）was measured by viscosity method.The product was discussed by infrared spectroscopy（IR）and cyclic voltammetry curves（CV）.The influence on concentration of monomer，current density and initiator concentration were investigated.The results showed that acrylamide and acrylic acid can be polymerized to poly（acrylamide-co-acrylic acid）by electrocatalytic polymerization under the effects of both cerium Ce（Ⅳ）and electrocatalytic systems.The best technological parameters were obtained：T=20℃，n（AM）∶n（AA）=2.3∶1，ω［Ce（Ⅳ）］=0.8%，I=0.125 A·cm-2，ω（H2SO4）=0.5 mol·L-1.The molecular weight of polyacrylamide was 6.5×105.The conversion rate could be increased to 70%.