In this paper, the preparation process of low viscosity light curing silicon oxide ceramic slurry and the properties of sintered samples were studied. By studying the effects of the type and concentration of dispersant and the solid content of ceramic powder on the viscosity and stability of slurry, silicon oxide ceramic slurry with low viscosity, high solid content and good stability was prepared. The properties of sintered samples of silicon oxide ceramics were verified by the compressive strength, shrinkage test and SEM observation. The results show that with stearic acid as dispersant, the mass fraction is 2wt % and the particle size of silicon powder is 10μm. When the solid content is 45wt%, the light curing ceramic slurry with the lowest viscosity and the most stable can be obtained. After curing, degreasing and sintering, the compressive strength of the SiO₂ ceramic sample prepared with the optimized parameters is 70.01 MPa, and the average shrinkage is 94.67%. It has good performance. The silicon oxide grains are arranged orderly, the structure is dense.