The invention relates to an energy-saving hydraulic device, which belongs to the technical field of hydraulic machines, and comprises an
oil tank and a partition plate fixedly connected in the
oil tank, and further comprises an oil pumping mechanism, a
hydraulic cylinder and a
hydraulic cylinder, an oil filtering mechanism; a separation mechanism; and a transmission mechanism. Through the arrangement of the separation mechanism and the
zeolite particles filled in the separation mechanism, when the oil pumping mechanism works, the separation mechanism is driven to rotate, hydraulic oil makes contact with the
zeolite particles in the separation mechanism through the separation mechanism, the
zeolite particles absorb water in the hydraulic oil, and after the zeolite particles absorb the water in the hydraulic oil, the zeolite particles are separated from the water in the separation mechanism. When the hydraulic device works, the zeolite particles release heat, the hydraulic oil is heated, the
viscosity of the hydraulic oil is reduced, the situation that the
viscosity of the hydraulic oil is too high, and consequently the flow resistance is increased is prevented, the working smoothness of the hydraulic device is improved, the zeolite particles can adsorb gas in the hydraulic oil, and the probability that the rigidity is reduced due to the existence of the gas is reduced. And the timeliness of hydraulic working of the hydraulic device is ensured.