The invention belongs to the technical field of hydraulic elements, relates to a combined valve device, in particular to a combined valve integrating the functions of a hydraulic control one-way valve, a one-way throttle valve and a relief valve. The combined valve comprises a valve body, wherein a first check valve plug, a second check valve plug, a throttle core rod, a hydraulic control valve plug and an overflow component and other control parts are arranged in the valve body, so that actual requirement can be achieved by using combination of the control parts. The combined valve has smartstructure, is compact and reasonable, has no inside connection thereby avoiding leakage point, has simple circuit connection, can be detached and maintained quickly and conveniently, improves production efficiency, has high rigidity and strength, can bear 70MPa hyperpressure, is safe and reliable, has wide application range, integrates the functions of the hydraulic control one-way valve, the one-way throttle valve and the relief valve, can effectively save space, and saves cost.