Oil absorption pressurization system and tractor

The utility model provides an oil absorption pressurization system and a tractor. The utility model relates to an oil suction pressurization system which comprises an oil suction valve, a refined filter with double filters connected in parallel, a gear pump, an open type load-sensitive variable pump and a closed type variable pump, wherein one end of the gear pump is connected with one end of the refined filter through a pipeline; the other end of the fine filter is connected with the first end of the oil suction valve, the first end of the open type load-sensitive variable pump and the first end of the closed type variable pump through pipelines. And the gear pump provides an oil source for oil absorption of the open load-sensitive variable pump and the closed variable pump. Fine filtration is achieved through double filters connected in parallel, the large-flow requirement of the system is met, and the cleanliness of hydraulic oil entering the open type load-sensitive variable pump and the closed type varia