Searchable　symmetric　encryption　(SSE)　provides　an　effective　way　to　search　encrypted　data　stored　on　untrusted　servers.　When　the　server　is　not　trusted,　it　is　indispensable　to　verify　the　results　returned　by　it.　However,　the　existing　SSE　schemes　either　lack　fairness　in　the　verification　of　search　results,　or　do　not　support　the　verification　of　multiple　keywords.　To　address　this,　we　designed　a　multi-keyword　verifiable　searchable　symmetric　encryption　scheme　based　on　blockchain,　which　provides　an　efficient　multi-keyword　search　and　fair　verification　of　search　results.　We　utilized　bitmap　to　build　a　search　index　in　order　to　improve　search　efficiency,　and　used　blockchain　to　ensure　fair　verification　of　search　results.　The　bitmap　and　hash　function　are　combined　to　realize　lightweight　multi-keyword　search　result　verification,　compared　with　the　existing　verification　schemes　using　public　key　cryptography　primitives,　our　scheme　reduces　the　verification　time　and　improves　the　verification　efficiency.　In　addition,　our　scheme　supports　the　dynamic　update　of　files　and　realizes　the　forward　security　in　update.　Finally,　formal　security　analysis　proves　that　our　scheme　is　secure　against　Chosen-Keyword　Attacks　(CKA),　experimental　analysis　demonstrations　that　our　scheme　is　efficient　and　viable　in　practice.　©　Copyright　2022　Xu　et　al.