Hydraulic balance energy-saving oil pumping machine

The utility model discloses a hydraulic balance energy-saving oil pumping machine which is used for oil extraction and gas extraction on an oil field. The hydraulic balance energy-saving oil pumping machine comprises a load end oil pumping rod, a hydraulic oil cylinder, an energy accumulator, a motor reducer, a chain, a fixed pulley, a movable pulley, a ball safety valve, a base framework, a chain wheel and a movable framework, wherein the hydraulic oil cylinder, the energy accumulator, the movable pulley and the chain are arranged in the base framework, and the motor reducer, the chain wheel, the movable framework and the fixed pulley are arranged on the base framework. According to the hydraulic balance energy-saving oil pumping machine, the length of stroke and frequency of the stroke are easy to adjust by means of hydraulic balance, matching performance between power and load is good, energy is effectively saved, and load of a prime motor can be greatly reduced. The hydraulic balance energy-saving oil pum