The invention discloses an inner electrode paste and a preparation method of the inner electrode paste. The inner electrode paste is characterized by being prepared from, by weight, 75-85% of silver powder, 0.5-2% of organic additive, 0.1-3% of inorganic additive, 3-7% of macromolecule resin, and 10-19% of organic solvent, wherein the organic additive is selected from at least one of hydrogenated castor oil and polyolefine wax, and the inorganic additive is selected from at least one of ZnO, CaO, ZrO2, SrO and BaO. The inner electrode paste is well matched with a dielectric layer of a ceramic capacitor.