Low-energy-consumption load sensitive system and tractor

The utility model relates to a low-energy-consumption load sensitive system which is characterized in that a flow control valve is arranged in a variable displacement piston pump, the variable displacement piston pump is connected with a multi-way valve through oil supply of a first pipeline structure, and the flow control valve is connected with the multi-way valve through a second pipeline structure in a control mode. According to the structure provided by the embodiment of the invention, the flow control valve is controlled by the pressure difference between the Px1 and the Ls1, due to the fact that almost no oil flows between the Px1 and the Px2, the pressures of the two points are the same, in the same way, the pressures of the Ls1 and the Ls2 are the same, and Px1-Ls1 = Px2-Ls2, so that the flow control of the variable displacement piston pump is not influenced by the pressure drop brought by the first oil supply pipe, the high-pressure fine filter and the second oil supply pipe, and the flow control pr