Hydraulic control valve

The invention discloses a hydraulic control valve. The hydraulic control valve controls a system main valve (20); the system main valve (20) is provided with an oil inlet communicated with a system oil source (P) and a working oil opening (A) communicated with an actuating mechanism; and the oil inlet can be communicated with the working oil opening (A) in a one-way manner trough an internal first one-way valve (33). The hydraulic control valve further comprises a normally-closed switching valve (30) which is connected between the working oil opening (A) and an oil return path and can switch on or off the working oil opening (A) and the oil return path. With the adoption of the technical scheme, when the system oil source (P) is communicated with the working oil opening (A) in the one-way manner without additionally arranging an energy accumulator, the working oil opening (A) further can keep a pre-set pressure within pre-set time.