The invention relates to a driving axle capable of inputting the electrically-controlled variable speed ratio by a right angle. The driving axle comprises a speed changer input shaft and a speed changer first shaft. The speed changer input shaft is provided with a first-gear driving gear, a second-gear driving gear and a synchronizer. The speed changer first shaft is provided with a first-gear driven gear engaged with the first-gear driving gear, a second-gear driven gear engaged with the second-gear driving gear and a driving gear. The driving gear is engaged with a driven gear arranged on a driving axle body. According to the driving axle capable of inputting the electrically-controlled variable speed ratio by the right angle, it can be known from the technical scheme that a driving motor is arranged to drive the speed changer input shaft, the driving gear is driven to rotate through a gear system of a two-gear speed changer device and transmitted to a left hub brake assembly and a right hub brake assembly through the driven gear, a differential mechanism and a half shaft and accordingly drives a left hub and a right hub to rotate, and the working conditions of straight running and steering of a vehicle are achieved; transmission can be achieved just through one driving motor; and the driving axle has the advantages of being simple in structure, reliable in performance, good in heat dissipation performance, low in cost and the like.