A method of manufacturing a ceramic primary crown including mixing a source material including zirconia or alumina that configures a frame of a primary crown, a polymer for reducing viscosity and applying ductility upon injection molding, and a toner for providing the same or similar color as baby teeth, heating the polymer contained in the mixed source material to have ductility, injection molding the heated source material, extracting the polymer to reduce brittleness and increase ductility with respect to the injection-molded matter, removing fat to completely eliminate the polymer element from the injection-molded matter, from which the polymer is partially extracted through the polymer extraction, sintering the fat-removed body, from which the polymer is removed, to improve mechanical properties, and polishing an outer surface of the sintered body to provide gloss, and performing barrel-finishing to remove a burr.