Gearbox and working vehicle

The utility model utility relates to the technical field of gearboxes, and provides a gearbox and an operation vehicle. The gearbox is used for achieving conversion of six forward gears and three reverse gears and comprises a power input shaft, a power output shaft and a transmission shaft, a power output shaft configured to output power; the gear transmission assembly is used for connecting the power input shaft and the power output shaft; the clutches are respectively arranged on the gear transmission assembly; wherein the two corresponding clutches are combined, so that the gear transmission assembly transmits power to the power output shaft through mutual meshing of the four pairs of gears so as to switch to the corresponding forward gear in the six forward gears. According to the gearbox and the operation vehicle, the transmission route can be shortened, noise in the gear shifting transmission process is reduced, the stability of the gearbox in the transmission process can be improved, and the service li