In　this　study,　two　configurations　of　alumina　(Al2O3)　ceramics　(hollow　lattice　structure　and　solid　lattice　structure)　were　prepared　by　DLP　3D　printing　technology.　When　sintered　at　1600　degrees　C　for　4　h,　dense　alumina　ceramics　with　an　average　grain　size　of　4.38　+/-　1.26　mu　m　can　be　obtained.　The　Al2O3　ceramics　prepared　by　DLP　process　have　good　forming　precision　and　shape.　The　dimension　error　can　be　controlled　about　0.2　mm.　The　compressive　strength　of　solid　block　is　572　MPa.　The　maximum　compressive　strength　of　solid　lattice　(2.0　mm　in　diameter　and　45%　in　porosity)　is　9.70　MPa.　The　maximum　compressive　strength　of　hollow　lattice　(2.0　mm　in　diameter,　0.3　mm　in　thickness　and　70%　in　porosity)　is　4.30　MPa.　The　thermal　simulation　results　show　that　the　temperature　of　the　hollow　lattice　(diameter　1.2　mm,　porosity　76%)　with　500　degrees　C　upper　surface　transferring　to　the　lower　surface　is　only　88.6　degrees　C,　which　is　lower　than　133　degrees　C　of　the　solid　lattice.　Hollow　lattice　structure　can　effectively　reduce　heat　loss　and　improve　energy　efficiency.　The　hollow　lattice　structure　Al2O3　ceramics　formed　by　DLP　technology　is　expected　to　be　used　in　industrial　thermal　insulation　applications.