The utility model discloses a hydraulic control system used for an industrial vehicle lifting device. The hydraulic control system comprises an oil tank, a hydraulic oil pump, a motor, an overflow valve, a check valve, a hydraulic cylinder and an electromagnetic unloading valve, wherein the overflow valve is communicated with an outlet of the hydraulic oil pump; an electromagnetic directional valve is arranged between the check valve and the hydraulic cylinder, an oil inlet of the electromagnetic directional valve is communicated with an oil outlet of the check valve, and a working oil port of the electromagnetic directional valve is communicated with the hydraulic cylinder; one-way flowing of hydraulic oil from the oil inlet of the electromagnetic directional valve to the working oil port of the electromagnetic directional valve exists in one working position of the electromagnetic directional valve; and the electromagnetic unloading valve is connected with the electromagnetic directional valve in parallel, and an oil inlet of the electromagnetic unloading valve is communicated with the oil outlet of the check valve. By using the hydraulic control system disclosed by the utility model, the service life of the hydraulic pump and the motor can be prolonged, energy consumption is reduced, the efficiency is increased, the safety of the whole system is good, and the positioning of the hydraulic cylinder is precise.