The　lead-free　tungsten　bronze　Sr1.86Ca0.　14NaNb5O15(SCNN)　ceramics　with　a　relative　density　of　97.5%　have　been　prepared　successfully　by　CO2laser　sintering.　The　optimized　process　parameters　are　laser　sintering　power　density　1.99　W/mm2,　laser　sintering　time　60　s,　and　raising/falling　rate　of　laser　power　density　0.50　W/mm2·min.　Compared　with　the　furnace　sintered　sample,　the　dielectric　permittivity　at　room　temperature　and　1　MHz　of　SCNN　ceramics　is　enhanced　from　1312　to　1419,　the　electromechanical　coupling　coefficient　k33　and　piezoelectric　strain　constants　d33of　the　laser　sintered　sample　are　significantly　enhanced　from　17%　to　27%　and　60　pC/N　to　93　pC/N,　respectively.　SEM　reveal　the　grain　size　of　the　laser　sintered　sample　decreases　obviously.　XRD　patterns　of　ceramic　disks　demonstrate　a　preferred　crystallographic　orientation　of　the　grains　with　their　c-axes　perpendicular　to　the　laser　irradiation　direction.