A ceramic material for improving surface adhesion of dental zirconia, a restorative material and a preparation method and a pasting method thereof are provided. The ceramic material includes SiO2, B2O3, GeO2, Al2O3, Li2O, Nb2O5, Na2O, ZrO2, P2O5, and a rare earth oxide. The ceramic material contains GeO2, on one hand, GeO2 can replace SiO2 in the ceramic material, thereby reducing the high-temperature melting temperature of glass, and saving the production cost, and on the other hand, GeO2 can effectively reduce the ratio of Si to Li, such that fine and uniform lithium disilicate crystals are formed after crystallization, and the adhesion strength with a zirconium oxide matrix is improved.