The utility model discloses a super little rubbing crusher of pregelatinized starch production usefulness, which comprises a housin, the inside of casing is provided with the inner tube, the upper and lower both ends of inner tube respectively with the upper and lower inner wall looks fixed connection of casing, the beneficial effects of the utility model are that: pregelatinized starch can reach minor crushing efficiency of grinding step by step in process of lapping is smashed to the cubic, promote the quality of pregelatinized starch's micronization, cold water passes through the inlet channel, intermediate layer and outlet conduit, the inside operating temperature who makes the inner tube keeps certain stability, avoid because the cubic grinds a large amount of heats of production and influences pregelatinized starch's production quality, pregelatinized starch passes through charge -in pipeline and pours into the storage incasement into, V -shaped plate mixs the pregelatinized starch of storage incasement troops under one's command side, make pregelatinized starch be difficult to block up the discharge gate, and when the pregelatinized starch of storage incasement surplus not not for a long time, V -shaped plate makes the buckle department of pregelatinized starch gathering at V -shaped plate, make pregelatinized starch can all pass through the discharge gate.