Abstract: To improve the photocatalytic performance of TiO2 on the surface of cotton fabric, the photocatalytically functioned decorative fabric was prepared by coating the substrate with palladiun (Pd) modified nano TiO2 using HAP protective agent. The surface deposition and efficiency of the catalytic degradation of formaldehyde of the finish on the treated fabric were examined by SEM, gas chromatography and other methods. The results indicated that the photocatalytic efficiency of the cotton fabric with Pd modified TiO2 was increased by 49% as compared with the cotton fabric without Pd modified TiO2, and it also had a very good UV protective effect. HAP faciliated the adhesion of photocatalytic agent on the surface of cotton fabric.