Hydraulic valve control device for thread roller

The utility model discloses a hydraulic valve control device for a thread roller. The hydraulic valve control device comprises a hydraulic oil cylinder and two hydraulic valves. The hydraulic oil cylinder is provided with two oil inlets and two oil outlets, the hydraulic valves are two-position four-way valves, the two oil inlets and the two oil outlets are communicated with two groups of ports on the same side of the two hydraulic valves respectively, and two groups of ports on the other side of the two hydraulic valves are respectively communicated with a hydraulic station. Two pneumatic control valves respectively correspond to the two hydraulic valves and are fixed on a machine body of the thread roller, pneumatic control valve rods of the pneumatic control valves respectively penetrate the machine body and are connected with hydraulic valve rods of the corresponding hydraulic valves, and valve bodies of the pneumatic control valves are respectively provided with two air inlet and outlet holes and connected with two air inlet and outlet pipes to be used for being connected with an air source. The hydraulic valve control device has the advantages that the valve rod positions of the two hydraulic valves are respectively controlled through the two pneumatic control valves, the extension of a cylinder rod of the hydraulic oil cylinder is controlled, the opening force of the control device is stable, the motion of the hydraulic valves is accurate, the service life can be prolonged, the production cost is reduced, and the production efficiency is improved.