Differential pressure control system of hydraulic system

The utility model discloses a pressure difference control system of a hydraulic system, and relates to the field of adjusting systems of hydraulic systems, an inlet of a full-flow oil way and an inlet of a throttling oil way are both communicated with a system oil inlet, an outlet of the full-flow oil way and an outlet of the throttling oil way are both communicated with a load port, a first overflow valve is communicated with the system oil inlet, and a second overflow valve is communicated with the load port. The first overflow valve is used for overflowing outwards from a system oil inlet and comprises an oil pressure control mechanism, the oil pressure control mechanism is communicated with a pressure difference control valve, a control port of the pressure difference control valve is communicated with a load port, and the first overflow valve can transmit pressure of the system oil inlet to the pressure difference control valve. And when the pressure difference between the pressure of the system oil inle