Ceramic stereolithography has a broad prospect in preparation of Al₂O₃-SiO₂ composite ceramics through which the prepared textured Al₂O₃-SiO₂ composite still faces challenges in improving their slurry quality and light intensity distribution. Here, characteristics of a novel ceramic slurry with addition of alumina platelet, equiaxed alumina, and spherical silica were investigated. Comparative analysis on viscosity, sedimentation, curing characteristics, and curing accuracy of the slurry with different solid content was carried out. Simulation algorithm of ultraviolet (UV) light intensity distribution was developed, and theoretical simulation analysis of light intensity distribution in the slurry during light exposure was carried out. Results of the prepared textured porous Al₂O₃-SiO₂ composite with the characteristics of oriented alumina platelet showed that combination of alumina platelet with spherical powders endowed the slurry with low viscosity and shear shinning behavior at high solid content in volume (40%-45%) of which alumina platelet took 50%-60%. Under the same content of the total solid, increasing either amount of alumina platelet or amount of spherical silica could reduce the viscosity, leading to the increase of the slurry total sedimentation. Alumina platelet in the slurry could reduce blocking and scattering of UV light better than equiaxed alumina. Under the same exposure conditions, both decreasing content of the equiaxed alumina and increasing content of the spherical silica could increase curing thickness of the slurry, while increasing content of alumina platelet and spherical silica could adversely increase error in dimension. Numerical simulation results showed that alumina platelet with approximately horizontal distribution showed week effect on UV light blocking and deflection, while that with approximately vertical distribution showed indeed guiding effect on UV light. The variation of the mean UV intensity at the upper boundary of the model was close to that of the curing thickness. Therefore, the established model can provide theoretical support for the experimental value of curing thickness.