The invention provides a combined type soybean impurity removal and air-drying device. The combined type soybean impurity removal and air-drying device comprises a push rod with a rubber sleeve, a concentric-square-shaped impurity removal and air-drying box, a base, universal wheels with brake pads, soybean anti-jump boards, a center seat, a small grain funnel, a medium grain funnel, a large grainfunnel, a super large grain funnel, a draggable mobile collection barrel structure, a soybean adjustable selection type picking rod structure, a soybean iron impurity inclination adjustable adsorption rod structure, a rapid air intake air-drying tube structure, a detachable dust and fine impurity collection tube structure, a soybean flow guiding tube and a soybean feed hopper. The push rod with the rubber sleeve is installed on the lower right side of the concentric-square-shaped impurity removal and air-drying box in a bolt mode. The concentric-square-shaped impurity removal and air-drying box is mounted on the upper surface of the base in a bolt mode. The combined type soybean impurity removal and air-drying device increases a soybean selection function, realizes the combination function of integrating the removal of iron impurities in soybeans with air drying, and can collect the impurities removed and increases a storage classification function after the soybean sorting.