The H2O2 catalytic cure of urea formaldehyde (UF) resins with different structures was investigated by Fourier transform infrared spectroscopy, carbon-13 nuclear magnetic resonance and thermal analysis. The results show that H2O2 can be used as an effective curing agent of UF resins. Compared with the traditional curing agent NH4Cl, with H2O2 the curing reaction of the resins takes place at higher temperatures and the exothermal enthalpy is larger; moreover, the pot life of the adhesive systems increases significantly. Scission of the triazinone and uron rings containing -NH- groups appears to some extent during curing.