The present invention discloses a drive shaft locking device, a power-driven system, and a vehicle. The drive shaft locking device comprises a planetary gear mechanism, wherein the planetary gear mechanism comprises a sun gear, a planetary gear, a planetary carrier, and a gear ring; a first drive shaft, a second drive shaft, and a power joint device, wherein the power joint device comprises a first joint part and a second joint part, the first drive shaft is connected with one of the sun gear, the planetary carrier and the gear ring, the second drive shaft is connected with another one of the sun gear, the planetary carrier and the gear ring, the first drive shaft and the first joint part synchronously rotate, and the second drive shaft and the second joint part synchronously rotate; and a joint part drive device which comprises a drive needle and a drive part, wherein the drive part is used for driving the drive needle to drive the second joint part to move towards the direction close to the first joint part along the axial direction, so that the second joint part is jointed with the first joint part. Therefore, the drive shaft locking device can lock two drive shafts and improve the capability of the vehicle to get rid of the trouble.