ZrB2–SiC　ceramic　is　one　of　most　promising　high　temperature　resistant　materials　in　the　field　of　thermal　protection,　and　its　strength　and　toughness　are　two　key　mechanical　indicators　which　determine　its　application　prospects.　How　to　conveniently　and　accurately　obtain　its　strength　and　toughness　is　of　great　value　for　engineering　applications.　In　this　paper,　the　tensile　strength　and　fracture　toughness　of　the　ZrB2–SiC　ceramic　were　obtained　according　to　the　boundary　effect　model　(BEM)　from　a　series　of　three-point　bending　tests　of　ZrB2–SiC　ceramic　samples.　Then,　the　BEM　method　and　normal　distribution　methodology　were　employed　for　analysis　of　strength　and　toughness　of　ZrB2–SiC　ceramic.　Results　show　that　there　exists　a　linear　relationship　between　maximum　loads　Pmax　and　effective　area　Ae,　and　the　slope　of　the　straight　line　passing　through　the　coordinate　origin　is　the　tensile　strength　ft.　The　tensile　strength　ft　and　fracture　toughness　KIC　of　ZrB2–SiC　ceramic　can　be　predicted　simply　from　a　set　of　three-point　bending　tests　according　to　the　BEM　method.　Similarly,　the　maximum　loads　Pmax　for　three-point　bending　samples　can　also　be　predicted　and　determined　when　the　ft,　KIC　and　average　grain　size　are　available.　Results　indicate　that　the　grain　sizes,　ft　and　KIC　of　the　ZrB2–SiC　ceramic　follow　the　law　of　normal　distribution.　Satisfactory　results　of　the　predicted　ft　and　KIC　between　the　upper　and　lower　bounds　with　95%　reliability　can　be　achieved　based　on　BEM　method.　©　2022