Searchable　symmetric　encryption　(SSE)　provides　a　safe　and　effective　solution　for　retrieving　encrypted　data　on　cloud　servers.　However,　the　existing　SSE　schemes　mainly　focus　on　single　keyword　search　in　single　client,　which　is　inefficient　for　multiple　keywords　and　cannot　meet　the　needs　for　multiple　clients.　Considering　the　above　drawbacks,　we　propose　a　scheme　enabling　dynamic　multi-client　and　Boolean　query　in　searchable　symmetric　encryption　for　cloud　storage　system　(DMC-SSE).　DMC-SSE　realizes　the　fine-grained　access　control　of　multiclient　in　SSE　by　attribute-based　encryption　(ABE)　and　novel　access　control　list　(ACL),　and　supports　Boolean　query　of　multiple　keywords.　In　addition,　DMC-SSE　realizes　the　full　dynamic　update　of　client　and　file.　Compared　with　the　existing　multi-client　schemes,　our　scheme　has　the　following　advantages:　1)　Dynamic.　DMC-SSE　not　only　supports　the　dynamic　addition　or　deletion　of　multiple　clients,　but　also　realizes　the　dynamic　update　of　files.　2)　Non-interactivity.　After　being　authorized,　the　client　can　query　keywords　without　the　help　of　the　data　owner　and　the　data　owner　can　dynamically　update　client???s　permissions　without　requiring　the　client　to　stay　online.　At　last,　the　security　analysis　and　experiments　results　demonstrate　that　our　scheme　is　safe　and　efficient.