The invention discloses a grain flotation, dust removal and air drying integrated device. A driving motor is arranged at the center of the upper end of a storage bucket; the lower part of the drivingmotor is rotationally connected with a driving shaft; the driving shaft penetrates through the storage bucket and is rotationally connected with the storage bucket; the right side of the upper end ofthe storage bucket is fixedly connected with a feed hopper; the feed hopper communicates with the storage bucket; the lower part of the storage bucket is provided with a rotary disc; the two sides ofthe rotary disc are symmetrically provided with discharging pipes; the rotary disc is fixedly connected with the driving shaft; the two sides of the bottom of the storage bucket are symmetrically provided with unloading pipes; and the lower ends of the discharging pipes cling to the rotary disc. According to the grain flotation, dust removal and air drying integrated device disclosed by the invention, the rotating driving shaft is used for driving crankshafts positioned at the two sides to rotate by virtue of a chain wheel and a chain; the crankshafts are used for driving a rubber plate to doreciprocating left-and-right movement along the inner wall of an air blowing chamber by utilizing connecting rods so as to continuously blow air into a device body, and thus air flow from a filter hole to an air discharging pipe is formed; and the air flow blows the grains and dust falling from the discharging pipes to realize a dust removal and air drying integration function.