A drive axle assembly of a vehicle, comprising: a motor; a first shaft and a second shaft, connected with the motor in sequence; a gearbox; a right fork, movable between a first position and a second position; a right inner ring-gear support; a right sun gear, a right inner planet gear, and a right outer planet gear, disposed in the right inner ring-gear support, wherein the right inner planet gear is meshed with the right sun gear, the right outer planet gear is meshed with both the right inner planet gear and the right inner ring-gear support, and the right sun gear is configured to rotate synchronously with the first shaft; a right planet support, connected with both the right inner planet gear and the right outer planet gear; a left fork, movable between a third position and a fourth position; a left inner ring-gear support; a left sun gear and a left planet gear, disposed in the left inner ring-gear support, wherein the left sun gear is configured to rotate coaxially with the right inner ring-gear support, the left planet gear is meshed with both the left sun gear and the left inner ring-gear support, and the left sun gear is configured to rotate synchronously with the second shaft; a driving gear, configured to rotate synchronously with the left planet gear by using a left planet support; a differential, connected with the driving gear, wherein when the right fork is at the first position, the right planet support is connected with the gearbox; when the right fork is at the second position, the right planet support is connected with the first shaft; when the left fork is at the third position, the left inner ring-gear support is connected with the gearbox; and when the left fork is at the fourth position, the left inner ring-gear support is connected with the second shaft, characterized in that the drive axle assembly further comprises a shift solenoid valve, connected with the left fork and the right fork to drive the left fork and the right fork to move. a motor; a first shaft and a second shaft, connected with the motor in sequence; a gearbox; a right fork, movable between a first position and a second position; a right inner ring-gear support; a right sun gear, a right inner planet gear, and a right outer planet gear, disposed in the right inner ring-gear support, wherein the right inner planet gear is meshed with the right sun gear, the right outer planet gear is meshed with both the right inner planet gear and the right inner ring-gear support, and the right sun gear is configured to rotate synchronously with the first shaft; a right planet support, connected with both the right inner planet gear and the right outer planet gear; a left fork, movable between a third position and a fourth position; a left inner ring-gear support; a left sun gear and a left planet gear, disposed in the left inner ring-gear support, wherein the left sun gear is configured to rotate coaxially with the right inner ring-gear support, the left planet gear is meshed with both the left sun gear and the left inner ring-gear support, and the left sun gear is configured to rotate synchronously with the second shaft; a driving gear, configured to rotate synchronously with the left planet gear by using a left planet support; a differential, connected with the driving gear, wherein when the right fork is at the first position, the right planet support is connected with the gearbox; when the right fork is at the second position, the right planet support is connected with the first shaft; when the left fork is at the third position, the left inner ring-gear support is connected with the gearbox; and when the left fork is at the fourth position, the left inner ring-gear support is connected with the second shaft, characterized in that the drive axle assembly further comprises a shift solenoid valve, connected with the left fork and the right fork to drive the left fork and the right fork to move.