Bi4Ti3O12/Ag/AgCl (BTO/Ag/AgCl) composite nanofibers were prepared and their visible light photocatalysis activities were studied. BTO nanofibers were prepared by electrostatic spinning and calcined at high temperature. BTO/Ag/AgCl composite fibers were prepared by chemical deposition and photoreduction modification of Ag/AgCl nanoparticles on BTO nanofiber surface. The results show that both of BTO and Ag/AgCl are highly crystallized. The BTO/Ag/AgCl shows enhanced visible light absorption than pure BTO nanofiber. Photocatalysis performance shows due to the enhanced visible light absorption and p-n junction between Ag/AgCl and BTO, BTO/Ag/AgCl composite nanofibers show enhanced visible light photocatalysis performance than BTO fibers. The degradation efficiency can be improved from 29% to 80% after 100 min visible light irradiation.