Tetrasulfophthalocyaninatozinc/titanium　dioxide　(ZnTsPc/TiO2)　was　synthesized　by　a　novel　in-situ　and　self-assembly　process.　The　prepared　products,　including　pure　TiO2　and　ZnTsPc,　were　characterized　by　XRD,　UV-Vis,　FTIR,　Zeta　potential　and　fluorescence　spectroscopic　techniques.　The　results　indicated　that　ZnTsPc　was　indeed　synthesized　during　the　in-situ　method　and　sol-gel　process.　A　chemical　bond　(-SO2-O-Ti-)　was　also　formed　between　the　sensitizer　(ZnTsPc)　and　the　surface　of　titanium　dioxide　particles.　The　photocatalyst　of　ZnTsPc/Ti02　reveals　greatly　enhanced　activity　for　the　degradation　of　organic　pollutant,　Rhodamine　B,　under　visible-light　irradiation　as　compared　with　pure　TiO2　and　P25.　The　sensitization　mechanism　is　that　photo-generated　charge　carriers　are　separated　by　the　chemical　bond　between　ZnTsPc　and　TiO2.