The sucker rod production is widely used in oilfield development, and its work efficiency directly affects the cost and economic benefits of oilfield development. In the light of the systematic dynamics, this paper takes the sucker rod pumping system as the study case for the purpose of establishing the mechanical and mathematical models for describing behaviors of the pumping unit, the pump, the tubing string, the compound system and the corresponding simulation models. Moreover, making use of idea of modular programming, it gives the basis for developing the computer simulation software on working action of the sucker rod pumping system, which has powerful function, convenience for use and maintenance and high simulation precision and can simulate operating performance of the sucker rod pumping system under different operating conditions, different swabbing parameters and different system configurations, to provides new approaches and theoretical foundations for analyzing the operating performance of the sucker rod pumping system and improving the work efficiency of the rod pumping system, etc.