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The oil pumping machine is a kind of machine oil, commonly known as "ketouji", by way of making oil well pressure. When the pumping oil machine stroke and elastic tubing contraction upward movement, driven mechanical plugging oil upward movement, the impact sliding sleeve vibration; at the same time, positive single flow valve is closed, reducing piston assembly is plugging the oil when the pumping unit stroke, downward motion of the elastic elongation of tubing drive the mechanical plugging oil downward movement, impact sliding sleeve vibration; at the same time, reverse uniflow valve closed, reducing piston assembly still plugging the oil sleeve annular oil passage, and the reverse uniflow valve area under high pressure zone is formed, the movement and in the formation of oil flow channel have a reverse impact force.