The invention discloses a permanent-magnet direct-driven fully-suspended traction transmission device of a single-hollow shaft railway vehicle. The permanent-magnet direct-driven fully-suspended traction transmission device comprises a permanent-magnet traction motor, an integral power output shaft, a hollow shaft, a left spline shaft I, a right spline shaft I, a left spline shaft II, a right spline shaft II, wheels, elastic suspending devices, elastic couplings, shaft boxes, supporting springs and bogie brackets, wherein the left spline shaft I and the right spline shaft I press on the two ends of the integral power output shaft; the left spline shaft II and the right spline shaft II press on the two ends of the hollow shaft; the integral power output shaft and the hollow shaft are connected into a whole body by the elastic couplings. The permanent-magnet direct-driven fully-suspended traction transmission device disclosed by the invention has the advantages that the power of the permanent-magnet traction motor is transferred to wheel pairs by the hollow shaft, so that the bending strength of the wheel pairs is improved, and the problem that a broken-shaft type coupling device iseasily loosened to cause potential safety hazards is solved; bearings at the two ends of the broken-shaft type structure are canceled and the reliability in operation of the railway vehicle is furtherimproved.