Double-clutch transmission for tractor

The utility model relates to a double-clutch transmission used for a tractor. The double-clutch transmission includes input shafts, intermediate shafts, and a main output shaft in transmission connection with the intermediate shafts, wherein a high/low gear shifting mechanism is in transmission connection with the main output shaft, and includes a high gear synchronous bevel gear, a low gear synchronous bevel gear, an auxiliary output shaft and a planetary gear mechanism; one synchronous bevel gear is fixedly connected onto a casing of the transmission; the other synchronous bevel gear is fixedly connected onto the auxiliary output shaft; the planetary gear mechanism includes a planet carrier, a planet gear, a sun gear and an annular gear; the sun gear is coaxially and fixedly connected with the main output shaft; the high/low gear shifting mechanism also includes a high/low gear synchronizer fixedly connected with the annular gear and being in transmission connection with the high gear synchronous bevel gear or the low gear synchronous bevel gear alternatively as required; and a driving power take-off section used for outwards outputting the power of the transmission is arranged on the auxiliary output shaft. The utility model provides the double-clutch transmission for the tractor, which can be used for high/low gear output, and can meet requirements of the tractor for speed in different operation working conditions.