By using tetra-butyl titanate as raw material, TiO₂/CNT composite particles were prepared by peptization-reflux method. Morphology of the samples was observed by scanning electron microscope(SEM) and transmission electron microscope(TEM). X-ray Photoelectron Spectroscopy(XPS) analysis show that Ti-O and —OH groups exist on the surfaces of TiO₂/CNT composite particles, and the difference between binding energies of Ti2p_3/2 and Ti2p_1/2 is about 5.7 eV. The photo-catalytic activity of composite particles was studied, and a degradation kinetic model was established by using TNT waste water as target pollutant. Results show that the process of degradation reaction accords with one order reaction kinetics equation. The degradation rate increases with the increase of the initial concentration of TNT in the experimental range, and the kinetic data match well with the L-H model.