The present invention relates to a method for processing grains for producing high-quality rice, carrying in a grain that has been threshed, but removing and removing foreign substances from the grains that have been threshed, followed by drying, and then storing the grains while maintaining a low temperature； A brown rice processing step for removing rice husk from rice grains but obtaining brown rice in a state in which both the embryonic layer and the whistle layer are preserved； A white rice processing step for peeling rice bran from brown rice and processing it into white rice； Including the packaging step of packaging； In the carrying-in and drying step, a debris removal device is provided to carry out the debris removal operation by bringing in the crushed rice grains, but the debris removal device is configured to input the crushed rice grains. Input hopper； It is for separating gumball or straw by receiving grain from the input hopper. It is provided with a cylindrical mesh having a perforation through which grain can be discharged, but is inclined downward, and a vent is formed on the upper surface of the inlet side and foreign matter on the lower surface of the outlet. Selected drum with an outlet； A sorting blower installed on an upper side of the sorting drum and supplying blown air in a direction inclined downward through a vent； Geombul discharge duct for discharging geombul or straw that is connected to the foreign material outlet of the sorting drum and separated from the rice grains； A re-insertion hopper disposed on the lower side of the sorting drum and guiding rice grains discharged through perforation in a downward direction； A separating plate located at the lower side of the re-entry hopper and disposed downwardly inclined, and having a perforation sized to discharge foreign substances of particles smaller than the grains of the grain； Vibration providing means for increasing the sorting force of the grain and foreign matter by providing vibr
