The invention provides a preparation method of a crucible and the crucible prepared by the method. The method comprises the steps of: mixing raw material compositions to obtain slurry; then, homogenizing, mixing and molding the slurry to obtain a green body; and drying and sintering the green body to obtain the crucible, wherein the raw material compositions comprise first fused quartz sand and deionized water; and before the slurry is molded, silicon monoxide is added into the slurry. The crucible prepared by the method is high in strength.