The invention belongs to the technical field of vehicles, and particularly relates to a differential mechanism, a control method thereof and a vehicle with the differential mechanism. The differentialmechanism comprises a power input gear, a differential mechanism shell, two planet gears, two side gears, two half shafts and a hydraulic locking device, wherein the power input gear is connected tothe outer side of the differential mechanism shell, the differential mechanism shell and the power input gear coaxially rotate, the two planet gears are connected to the inner side of the differentialmechanism shell, the two planet gears are located between the two side gears, the two side gears mesh with the two planet gears correspondingly, the two side gears are coaxial with the power input gear, the two side gears are connected to the two half shafts correspondingly, the two half shafts penetrate through the differential mechanism shell in the mode of being capable of rotating relative tothe differential mechanism shell, and the hydraulic locking device is arranged on the two half shafts.