Three-dimensional　dendritic　C/PbWO4　composite　photocatalyst　with　different　C　content　(Mass　fraction　=　0.13%,　0.26%,　0.52%,　0.78%)　was　synthesized　by　a　hydrothermal　method.　The　photocatalysts　were　characterized　by　X-ray　diffraction,　N2　sorption　measurements,　scanning　electron　microscopy,　transmission　electron　microscopy,　energy　dispersive　X-ray　spectroscopy,　ultraviolet-visible　diffuse　reflectance　spectroscopies,　photoluminescence,　and　photoelectrochemical　measurement.　The　results　showed　that　the　dendritic　C/PbWO4　composite　photocatalyst　with　0.52%　C　exhibits　the　best　photocatalytic　performance　in　degrading　orange　II,　methyl　orange　and　rhodamine　B.　Under　the　light　irradiation　for　100　min,　the　degradation　rate　of　the　acid　orange　II　(20　mg　·　L−1)　over　0.52%　C/PbWO4　reached　97%　which　was　about　2.48　times　as　that　of　bare　PbWO4.　The　main　reason　for　the　increase　of　activity　is　that　carbon　attached　to　the　surface　of　the　catalyst　becomes　the　electron　trapping　center,　and　it　can　effectively　capture　the　photogenerated　electrons.　Therefore,　the　photo-generated　electron-hole　pairs　were　effectively　separated　to　produce　more　active　species　(·OH,　h+)　to　participate　in　the　degradation　of　organic　dye　molecules.　©　2018,　Chinese　Journal　of　Inorganic　Chemistry.　All　rights　reserved.