The utility model relates to the field of hydraulic control systems, aims at a hydraulic control system with a cartridge valve and relates to a device for dismounting a valve sleeve of the cartridge valve. The device comprises at least two hooks, a horizontal frame, a hand wheel and two screws and is characterized in that the upper ends of the two hooks respectively penetrate through the horizontal frame through pin holes, the lower ends of the two hooks are fixedly connected with a Y-shaped hinge, the upper end of the hinge is fixedly connected with a lead screw, an internal-external nut sleeve is positioned at the top end of the lead screw and connected with the hand wheel through a nut, the two screws are respectively connected with the horizontal frame through thread holes, and the screws penetrate through one end of the horizontal frame to abut against a valve block. The device for dismounting the valve sleeve of the cartridge valve can quickly and simply dismount the cartridge valve and is suitable for DN32-DN160 cartridge valves of different specifications by adjusting the positions of the hooks on the horizontal frames.