The invention relates to grinding devices, and particularly relates to a ceramic raw material grinding device. According to the device, primary grinding is realized by virtue of a mechanical movement,a hammer plate, an impact plate I and an impact plate II, a great number of rock-shaped ceramic raw materials are ground into stones, the stones having different sizes are separated through a screening mechanism, big stones are ground into small stones through a roller I and a roller II to realize secondary grinding, and all small stones or ballasts and the like are ground into powder through grinding rollers to realize tertiary grinding. The device comprises a rack, a shell I, a shell II, a shell III, an impact component, the impact plate I, the impact plate II, a grinding mechanism I, the screening mechanism and a grinding mechanism II, wherein the shell II comprises a shell II main body, a hinge support, a spacing plate, an opening, a blanking opening and a slot; the shell III comprises a feed hopper, a grinding tank, a blanking pipeline and a grinding tank; the impact component comprises an impact rack, an impact shaft and a spacing ring; and the impact plate I comprises an impactplate main body I and an auxiliary groove I.