The　removal　of　toxic　hexavalent　chromium　(Cr(VI))　ions　from　surface　and　ground　water　is　highly　demanded.　While　photocatalytic　reduction　of　Cr(VI)　to　Cr(III)　by　traditional　powder　photocatalysts　is　a　promising　method,　the　difficult　in　the　separation　of　the　photocatalysts　from　the　water　hinders　their　wide　practical　applications.　Herein　we　present　the　use　of　metal-organic　framework　(MOF)　UiO-66-NH2(Zr/Hf)　membrane　as　photocatalysts　to　reduce　Cr(VI)　ions　with　high　efficiency　and　easy　separation　from　the　treated　waste　water.　The　UiO-66-NH2(Zr/Hf)　MOF　membrane　photocatalysts　were　fabricated　via　a　reactive　seeding　method　on　a　alpha-Al2O3　substrate.　It　was　found　that　the　UiO-66-NH2(Zr/Hf)　membranes　exhibited　excellent　photocatalytic　Cr(VI)　reduction　performance　under　both　simulated　and　real　sunlight　irradiation.　The　UiO-66-NH2(Zr)　membrane　can　maintain　more　than　94%　Cr(VI)　reduction　efficiency　after　20　cycles　because　of　its　exceptional　chemical　and　water　stability.　The　influences　of　foreign　ions　on　Cr(VI)　reduction　were　investigated　to　mimic　real　lake　water,　which　revealed　that　no　obvious　adverse　effects　can　be　found　with　the　presence　of　common　foreign　ions　in　surface　water.　The　MOF　membrane　photocatalysts　provide　a　new　approach　to　carry　out　efficiently　photocatalytic　removal　of　pollutants　in　wastewater.