The invention provides a hydraulic clutch gearbox. The hydraulic clutch gearbox comprises a drive mechanism, hydraulic clutches and an oil supply manipulation component, wherein the drive mechanism comprises a power input component and a power output component, the power input component comprises an input shaft connected with an engine and a plurality of driving gears which fixedly sleeve the input shaft, the power output component comprises an output shaft connected with a device and a plurality of driven gears which movably sleeve the output shaft, the driving gears and the driven gears aremeshed in one-to-one correspondence mode and form gear sets of different transmission ratios, each hydraulic clutch is set to have a combination state and a separation state which can be switched, theseparation state is set to be an original state of each hydraulic clutch, a plurality of the hydraulic clutches are arranged and in one-to-one correspondence with the driven gears, the hydraulic clutches in the combination state are used for transmitting power of the corresponding driven gears to the output shaft, and the oil supply manipulation component is used for supplying hydraulic oil to the hydraulic clutches and controlling switching between the combination state and the separation state of the hydraulic clutches.