The metal salt catalytic agent and hydrogen peroxide were chosen to oxidize the soluble starch, and the content of aldehyde group was determined by electrictitration, which was 41.3%. The result of FT-IR and thermogravimetry analysis of oxidized starch also showed the existence of aldehyde group and symmetrical degree of oxidation. At last, the glycyglycine and glutin were treated with the oxidated starch. By testing the carbon nuclear magnetic resonance (13CNMR) spectrograms of native and modified glycyglycine, the kinetic viscosity and denaturation temperature (Td) of the native and treated glutin, it was concluded that oxidated starch could cross link with amido link of protein, and the viscosity of native glutin was 19.07 and 4.13 mm2/s at 30 and 50 ℃ respectively, which was reduced to 6.40 and 3.69 mm2/s for the modified glutin at the same temperature.This also was proved by the fact that the Td of treated glutin was increased to 194.0 ℃ from 122.4 ℃.
