Box-structured　nanomaterials　with　complicated　surface　texture,　whose　morphologies　can　be　adjusted　through　changing　mass　ratios　of　reactants,　are　attractive　in　the　field　of　electrochemical　energy　conversion.　Herein,　we　report　the　shape-controllable　synthesis　of　MoS2　doped　cobalt　iron　sulfide　(Co-Fe-MoSx)　hollow　nanoboxes　with　three　different　mass　ratios　of　cobalt　iron　Prussian-blue-analog　(Co-Fe　PBA)　nanocubes　to　(NH4)2MoS4　and　their　applications　in　dye-sensitized　solar　cells　(DSSCs).　As　the　increment　of　MoS42−　in　system,　the　surface　of　Co-Fe-MoSx　became　rough　with　bushy　embedded　nanosheets.　Benefiting　from　the　three-dimensional　nanostructure　with　more　exposed　edge　sites　and　appropriate　doped　ratio,　the　Co-Fe-MoSx-2　hollow　nanoboxes　performed　rough　shells,　well-defined　interior　voids,　large　specific　surface　areas　and　outstanding　catalytic　actives.　By　contrast,　the　sulfide　of　Co-Fe　PBA　(Co-Fe-S)　and　bare　MoS2　showed　bad　morphology　and　poor　catalytic　performance.　It　is　notable　that　the　DSSC　with　Co-Fe-MoSx-2　showed　a　much　higher　power　conversion　efficiency　(PCE)　of　9.63%　than　that　of　Pt　based　cell　(8.23%)　under　AM　1.5G　irradiation.　©　2018　Elsevier　B.V.