Photocatalytic　H-2　evolution　through　water　splitting　as　a　promising　way　of　direct　converting　solar　energy　into　chemical　energy　has　attracted　numerous　attention.　As　an　II-IV　semiconductor,　ZnS　was　advanced　at　high　photocatalytic　activity　without　any　co-catalyst.　In　this　study,　a　stirring-assisted　hydrothermal　method　was　designed　to　introduce　Cu　dopant　into　ZnS　while　carefully　controlling　the　morphology.　The　H-2　evolution　rate　were　increased　with　the　content　of　Cu　in　the　Zn1-xCuxS.　H-2　production　rate　of　1296　mu　mol/h/g　were　achieved　and　reached　the　summit　for　Zn0.99Cu0.01S.　Calculation　result　suggested　an　impurity　energy　level　was　induced　by　Cu　dopant.　A　reversible　photochromism　has　found　in　the　Zn1-xCuxS.　The　transformation　of　Cu+　and　Cu2+　was　suggested　to　be　the　photochromic　mechanism.　As　a　result,　the　photocatalytic　efficiency　and　stability　of　photocatalyst　were　improved　during　photocatalytic　process.　The　photocatalytic　and　the　anti-photocorrosion　mechanism　were　discussed　and　it　would　promote　a　new　strategy　to　design　photochromic　photocatalysts.　(c)　2020　Elsevier　B.V.　All　rights　reserved.