Hydraulic differential circuit system composed of threaded cartridge valves

The utility model discloses a hydraulic differential circuit system composed of threaded cartridge valves. The hydraulic differential circuit system comprises a system oil inlet, a system oil return opening, a first system oil outlet, a second system oil outlet, the cartridge throttle valve, the cartridge reversing valve, the cartridge balance valve, a first cartridge pilot operated check valve, a second cartridge pilot operated check valve and a hydraulic cylinder. The valve modules of the hydraulic differential circuit system are composed of the threaded cartridge valves, leakage of hydraulic oil can be effectively avoided, the threaded cartridge valves further have the advantages that the valves are small in integrated size, low in noise, high in interchangeability, convenient to mount and the like, and cartridge type installation is convenient, the hydraulic cylinder can be controlled to move forwards quickly, move forwards under high pressure, quickly retract and stop working only by controlling reversing of the cartridge reversing valve, and operation is convenient.