Full-variable hydraulic system and loading machine

The utility model relates to a loader hydraulic system and provides a full-variable hydraulic system and a loader in order to solve the problems that in an existing loader constant and variable hydraulic system, a distribution valve oil way is complex in structure and high in energy consumption. A first variable pressure oil source of the full-variable hydraulic system is communicated with a working oil inlet of a first main valve and a middle-position oil outlet of a second main valve at the same time, and a second variable pressure oil source is communicated with a working oil inlet of the second main valve and a middle-position oil outlet of the first main valve at the same time. When the first main valve and the second main valve are in the middle position, the middle-position oil inlet and the middle-position oil outlet are communicated, and when the first main valve and the second main valve are not in the middle position, the middle-position oil inlet and the middle-position oil outlet are cut off; loa