Abstract: This paper introduces the components and main technical parameters of Russian Navy＇s（including ex-USSR） non-nuclear submarine propulsion systems,in regard to diesel power,main axial propulsion electrical motor power,max surface and submerged speed,together with the major configurations of propulsion system and cabin layouts.Particular introductions are given to a variety of researches carried out by the Russian on the non-nuclear submarine power system,including closed-cycle diesel power plant,closed-cycle steam power plant and electric-chemical generator plant.Based on that,the development trends and future prospect of the Russian navy＇s nnon-nuclear submarine power system are also provided.