The invention provides a full trailer, comprising a frame and a truck. The trailer also comprises a baffle of which the middle part is hinged with a fixed shaft positioned at the front part of a front crossbeam of the truck, and a drive device which drives the baffle to rotate around the fixed shaft, wherein the drive device is arranged at the rear part of the front crossbeam of the truck; the front crossbeam of the frame is provided with a pair of positioning devices which limit the baffle to prevent the truck from freely rotating; and a control mechanism of the drive device is arranged in acab of the full trailer. The full trailer solves the problems of unsafety and low efficiency existing in the prior art, and has the advantages of safe and quick operation, simpleness and reliability.