This invention relates to a mold for synthesizing powder, and particularly to a mold for synthesizing ceramic powder suitable for use as a mold system which is subjected to spark plasma sintering, which includes a cylindrical mold body into which a powder material used to synthesize ceramic powder is charged, and a pair of mold covers respectively disposed in contact with the top and the bottom of the mold body, thus basically suppressing the production of aggregates in synthesized powder due to pressing and also enabling the mold system to operate even when using a small amount of power, so that the system is prevented from malfunctioning and the power consumption thereof is reduced upon operating.