To　date,　overcoming　the　trade-off　between　high　solid　loading　and　print　accuracy　and　strength,　achieving　high　-performance　and　fine　ZrO2　micro-ceramic　components　through　vat　photopolymerization　3D　printing　remains　challenging.　In　this　study,　the　effects　of　dispersant,　particle　size　and　solid　content　on　the　dispersion,　rheological　behavior　and　stability　of　ZrO2　ceramic　slurry　were　systematically　studied,　and　complex,　fine　and　high　-performance　ZrO2　micro-ceramic　gears　were　successfully　prepared.　Then,　the　microstructure,　mechanical　properties,　tribological　properties　and　surface　quality　were　evaluated.　The　results　show　that　the　rheological　behavior　of　the　slurry　is　the　best　when　the　optimal　dispersant　content　is　3.5　wt%.　With　the　increase　of　solid　content,　the　sintering　shrinkage　of　ZrO2(3Y)/Al2O3　ceramics　decreased,　while　the　relative　density,　compressive　strength,　flexural　strength,　fracture　toughness　and　hardness　increased.　The　prepared　micro-ceramic　gears　not　only　have　fine　structure,　but　also　have　dense　microstructure　and　good　mechanical　properties.　The　relative　density,　compressive　strength,　flexural　strength,　fracture　toughness　and　hardness　strength　of　ZrO2(3Y)/Al2O3　ceramics　can　reach　98.53　%,　1900　MPa,　648　MPa,　6.4　MPa　x　m1/2　and　13.40　GPa,　respectively.　In　particular,　this　study　couples　the　printing　accuracy　and　strength　with　the　solid　load.　By　adjusting　the　relationship　between　the　fixed　load　and　the　shrinkage　rate,　the　printing　of　samples　with　different　sizes　is　realized,　which　breaks　through　the　accuracy　limit　of　the　printing　equipment　and　provides　a　new　idea　for　the　preparation　of　micro-ceramic　gears.