The　Bi3O4Br　nanosheets　and　xBi2WO6-Bi3O4Br　(Bi2WO6/Bi3O4Br　molar　ratio　(x)　=　0.03,　0.08,　and　0.15)　heterostructures　were　prepared　using　the　hydrothermal　and　ion-exchange　strategies,　respectively.　Due　to　the　strong　interface　interaction　and　staggered　energy　band　structure　between　Bi2WO6　and　Bi3O4Br,　a　Z-scheme　charge　migration　path　was　established,　which　improved　the　charge　separation　and　migration　efficiencies　and　retained　enough　redox　potentials　of　the　charge　carriers.　The　bisphenol　A　(BPA)　degradation　activities　over　the　xBi2-　WO6-Bi3O4Br　photocatalysts　under　visible-light　illumination　were　much　higher　than　those　over　their　single　components.　The　0.08Bi2WO6-Bi3O4Br　photocatalyst　exhibited　the　highest　photocatalytic　performance,　which　was　2.53　and　7.11　times　higher　than　those　over　the　Bi3O4Br　and　Bi2WO6　photocatalysts,　respectively.　Furthermore,　we　also　investigated　the　effects　of　ions,　pH,　and　water　kinds　on　photocatalytic　activity　of　the　typical　sample,　and　proposed　the　possible　photocatalytic　degradation　mechanism.　This　work　provides　a　useful　guideline　for　constructing　high-efficiency　photocatalysts　for　wastewater　treatments　and　expanding　photocatalytic　applications　of　the　two-dimensional　Bi-based　semiconductors.