The invention relates to a double-clutch transmission used in a tractor. The double-clutch transmission comprises two input shafts, a first intermediate shaft and a second intermediate shaft, wherein the two input shafts are arranged coaxially, the first intermediate shaft and the second intermediate shaft are parallel to the input shafts, an odd number of tap position driving gears and an even number of tap position driving gears are respectively fixed on the two input shafts, and a first driven gear set which is in mesh transmission with the driving gears on the corresponding input shaft is idly sleeved on the first intermediate shaft; and a second driven gear set and a tap position reversing driven gear which are in transmission connection with the driving gears on the corresponding input shaft are idly sleeved on the second intermediate shaft, the first intermediate shaft and the second intermediate shaft are respectively provided with a torque output section which is used for outwards outputting corresponding torque, and the tap position reversing driven gear is in mesh transmission with one driven gear of the first driven gear set. The original tap position reversing idle gear and the original tap position reversing idle gear shaft are eliminated, so that the structure is relatively compact, the quantity of parts is reduced, the manufacturing cost is saved, and the installation difficulty is decreased.