BaTiO3/Ca10(PO4)6(OH)2　composite　ceramic　is　an　outstanding　representative　of　piezoelectric　biomaterials,　with　excellent　biocompatibility　and　piezoelectric　effect,　and　has　potential　applications　in　the　field　of　bone　tissue　repair.　In　this　work,　vat　photopolymerization　3D　printing　technology　was　used　to　fabricate　triply　periodic　minimal　surface　structure　BaTiO3/Ca10(PO4)6(OH)2　composite　ceramic　bone　tissue　scaffolds　with　different　pore　sizes　and　porosity,　and　their　mechanical　and　electrical　properties　were　studied.　First,　the　ceramic　slurry　configuration　process　was　optimized　to　obtain　a　ceramic　slurry　with　high　solid　content　(45　vol%)　and　excellent　rheological　properties.　Then　the　effect　of　sintering　temperature　on　microstructure,　relative　density,　mechanical　properties,　and　electrical　properties　is　discussed.　The　results　show　that　when　sintering　at　1300　°C,　the　BaTiO3/Ca10(PO4)6(OH)2　composite　ceramic　has　the　highest　relative　density　(99.18　%),　the　highest　compressive　strength　(44　MPa),　large　relative　dielectric　constant　(379–389),　and　low　dielectric　loss.　The　polarization　electric　field　strength　of　the　BaTiO3/Ca10(PO4)6(OH)2　composite　ceramic　was　set　to　15　kV/cm　through　the　test　of　the　hysteresis　loop.　Finally,　based　on　multi-physics　coupled　finite　element　simulation,　the　effects　of　different　porosity　and　different　pore　sizes　on　stress　distribution　and　piezoelectric　potential　were　analyzed,　and　the　relationship　between　them　was　explored　through　experiments.　The　results　show　that　as　the　porosity　increases　and　the　pore　size　decreases,　the　mechanical　properties　of　the　scaffold　decrease　significantly,　and　its　compressive　strength　ranges　between　1.67　and　4.26　MPa;　as　the　porosity　increases　and　the　pore　size　increases,　the　piezoelectric　coefficient　(d33)　of　the　scaffold　showed　a　decreasing　trend,　and　its　d33　ranged　between　2　and　9　pC/N.　The　mechanical　and　electrical　properties　of　the　scaffold　meet　the　performance　requirements　of　cancellous　bone.　In　summary,　this　work　provides　a　strategy　for　the　application　of　customized　BaTiO3/Ca10(PO4)6(OH)2　composite　ceramic　scaffolds　in　new-generation　orthopedic　implants.　©　2024　Elsevier　Ltd　and　Techna　Group　S.r.l.