The present invention discloses a trailed grain transfer trolley, comprising a frame (21) and a carriage (4), and further comprising a screw conveying system, a lifting device (3) and a rotating device (1), wherein the screw conveying system comprises a bottom conveying device (15), a lateral conveying device (2) and a grain output arm (6), the rotating device (1) comprises a second gear (1-3) mounted on the outside of the lateral conveying device (2), an electrical rotating machine (1-1) mounted on the frame (21) and a transmission gear (1-2) in connection with the electrical rotating machine (1-1), the transmission gear (1-2) is in mesh connection with the second gear (1-3) the upper end of the lateral conveying device (2) and the grain output arm (6) are connected together through a connector (20) the lifting device (3) comprises a supporting bar (3-1) and a hydraulic cylinder (3-2), wherein the upper ends of the supporting bar (3-1) and the hydraulic cylinder (3-2) are hinged on the grain output arm (6) through one same revolving shaft, the lower end of the supporting bar (3-1) is hinged with the lateral of the connector (20), and the lower end of the hydraulic cylinder (3-2) is hinged with the lateral of the connector (20). The present invention has benefits that the trailed grain transfer trolley can be operated with a harvester concurrently in a field and can transfer grains from the field to a road and discharge the grains into a truck.
