Metallurgical lead and zinc slag taken as resource of silver, silver modified nanomaterials Ag@SiO₂@TiO₂ were successfully synthesized by chlorine salt method, St?ber method, sol-gel method and photo-deposited method. X-ray diffraction (XRD)and transmission electron microscopy (TEM) prove that composite Ag@SiO₂@TiO₂with core-shell structure, which Ag was deposited on anatase TiO₂ in the form of cluster with 10 nm diameter. X-ray photoelectron spectroscope (XPS) indicates that in silver modified Ag@SiO₂@TiO₂, TiO₂ was chemisorbed on SiO₂ core in Ti-O-Si chemical bond and Ag deposited on TiO₂ shell was elementary substance of silver. UV-vis diffuse reflectance spectra (DRS) shows that silver modified Ag@SiO₂@TiO₂ widened TiO₂ response range towards light to expand to visible region. The photocatalytic degradation reaction of rhodamine indicates that silver modified nanocomposite Ag@SiO₂@TiO₂ possessed the excellt catalytic performance.