The invention relates to a method for producing coarse cereals rice by extruding a double screw, wherein, the coarse cereals rice takes five cereals as raw materials. The method comprises the following steps: pretreating the raw materials, stirring the raw materials in a mixing way, extruding and curing the raw materials at one time with a double screw extruder and a double screw extruding technology; graining and shaping the raw materials; drying the raw materials; and cooling the raw materials, etc. The coarse cereals rice absolutely takes five cereals as raw materials without any additives and ancillary materials. The coarse cereals rice has various external shapes according to requirements, has a compact structure without the need for polishing, stable quality, good edible quality, balanced nutrition and strong health function, is free of cleaning and convenient, can be stored for a long time, has good heat stability when being cooked, and can be eaten as staple food as the common rice. The invention has the advantages of high production, continuous production process which is especially suitable for large-scale industrialization production, stable product quality, low cost, small production floor space, etc.