Endeavoring　to　the　imperative　and　challenging　issue　of　developing　efficient　and　applicable　visible　route　for　modifying　TiO2-based　photocatalysts　work　efficiently　in　both　the　UV　and　visible　regions.　The　cholorine　acted　not　only　as　a　key　component,　endowing　TiO2　with　fascinating　visible　light　activity,but　also　as　an　effective　promoter　rendering　both　visible　light　and　UV　photocatalysts　with　remarkly　enhanced　activity.　The　increase　in　oxygen　vacanies　and　the　chain　transfer　reaction　initiated　by　chlorine　radicals　were　mainly　responsible　for　the　remarkable　improvement　in　activity.