The invention discloses a device for collecting and drying grains, and belongs to the technical field of agricultural machinery. The device for collecting and drying the grains is composed of a machine shell, a bucket assembly, a bag packer, a sealing device, a supporting plate, a separating plate, an upper rotating disc, a lower rotating disc, wheels, a first shaft, a second shaft, an armrest, adirect current motor, a switch, a storage battery, a third shaft and a motor mounting bracket. According to the device for collecting and drying the grains, a high degree of mechanization is realized,and no other electrical equipment is used in the whole process of grain collection except the direct current motor for controlling the rotation of the upper rotating disc, and the automation level ofthe grain collection is improved, the risk of equipment maintenance is reduced, the service life of the device is prolonged, and the cost is reduced greatly; and the combined action of the upper rotating disc, the lower rotating disc and the bucket assembly is used ingeniously, and a direct position relationship between the upper rotating disc and the lower rotating disc is controlled accurately,and a position relationship between an upper rotating disc mounting hole and a lower rotating disc mounting hole which are positioned at the bucket assembly is controlled accurately, and thus the accurate control over the movement of the bucket assembly always keeping level to the floor is ensured.