Achieving　high-quality　joining　of　silicon　carbide　(SiC)　ceramics　and　Inconel　718　alloy　has　become　a　significant　challenge　for　the　brazing　process,　which　is　strongly　dependent　on　the　filler　material.　A　novel　composite　interlayer　consisting　of　high-entropy　alloys　(HEAs),　HEA/Ni/HEA,　was　proposed　to　reduce　the　formation　of　intermetallic　compounds　in　the　brazed　joints　of　SiC　ceramics　and　Inconel　718　alloy.　A　reliable　SiC/Inconel　718　brazed　joint　was　produced　at　1120　degrees　C　for　60　min.　The　results　showed　a　significant　reduction　in　the　number　of　NiSi　compounds　in　the　brazed　joint.　The　brazing　seam　structure　near　SiC　side　was　filled　with　face-centered　cubic　phases　with　good　plasticity　and　soft　Cu-rich　phases　due　to　the　high-entropy　effect,　which　effectively　suppressed　the　formation　of　intermetallic　compounds.　The　maximum　shear　strength　of　the　brazed　joint　reached　88　MPa,　showing　excellent　tensile　strength.　The　results　provide　a　valuable　basis　for　improving　the　joint　quality　of　SiC　ceramics　and　metals　by　adding　high-entropy　alloy　fillers.