The invention discloses an edible grain, bean and potato coarse cereal rice composition and a preparing method thereof and belongs to the technical field of grain 
deep processing. According to the edible grain, bean and potato coarse cereal rice composition, 
broken rice is used as a main 
raw material, after ultrasonic cleaning, 
microwave curing, 
drying and sterilizing of the 
broken rice, the 
broken rice, grain 
powder with a special 
flavor, enzymatic 
hydrolysate and other functional raw materials are pelletized, and then grain arrangement and 
processing through a 
microwave drying device are carried out, so that the edible grain, bean and potato coarse cereal rice composition is obtained. The edible grain, bean and potato coarse cereal rice composition has a tissue structure, 
granularity, 
hardness and 
viscosity which are similar to those of rice, can be boiled and cooked with rice, has the taste and 
chewiness, which are similar to those of cooked rice, is unique in 
flavor, soft in fragrance, high in 
appetite attractiveness, easy to digest and comprehensive in 
nutrition, and can improve the 
immunity and 
disease resistance of the human bodies and improve the 
gastrointestinal function. The guarantee period is three times of that of commercial rice. More importantly, a shortcut is developed for the efficient value-added comprehensive utilization of the broken rice, the road for the 
deep processing of the broken rice is broadened, and the economical value of the broken rice is increased. Better 
social benefits and 
economic benefits are realized and a 
sustainable development road for the 
deep processing of agricultural byproducts and the effective solving of Three-Rural problems is explored.