Abstract: This paper presents the drawing method of supply-discharge coordinated chart of sucker rod pump, analyses the process to select optimally pumping unit, sucker rod pump, pump setting depth, stroke and frequency of stroke with the help of supply-discarge coordinated chart by practical sample. Application results show that the coordinated chart can reflect the dynamic performance of sucker rod pump, and can be used to select pumping unit and pumping parameters. It has the advantuges of intuition, convenience, easy to contrast and select etc.