Abstract: The article presents a new project of the long stroke nobean pumping unit of hydraulic controlling and mechanical transmitting power，states the construction and the principle of this kind of sucker rod pumping unit,preliminarily analyzes its performance,and explaimq its advantages of being small in size ,light in weight ,high in reliability and efficiency,good in kinetic property.convenient to control and adjust,and easy to realize long stroke,etc.

Key words: Hydraulic control, Gear drive, Pumping unit