Tractor hydraulic continuously variable transmission device

The utility model discloses a tractor hydraulic continuously variable transmission device. The tractor hydraulic continuously variable transmission device comprises a transmission mechanism and a continuously variable mechanism. The transmission mechanism comprises a power input shaft, a walking output shaft, a working output shaft and multi-gear gear pairs. The multi-gear driving gears are fixed to the working output shaft at intervals, and the multi-gear driven gears are arranged on the walking output shaft in a sleeving mode. The continuously variable mechanism comprises a variable pump, a variable pump drive gear pair, a variable motor and a variable motor output gear pair. Gears of the variable pump drive gear pair are fixed to one end of the power input shaft and a variable pump input shaft, the output end of the variable pump is connected with the input end of the variable motor, and gears of the variable motor output gear pair are fixed to the output shaft of the variable motor and one end of the working output shaft. The motor output rotating speed can achieve variable switching from zero to the needed rotating speed in the manner of adjusting the flow of the variable pump, the variable motor can rotate reversely when the flowing direction of high-pressure oil of the variable pump is controlled, and therefore a tractor can reverse a gear and move backwards.