Landing field oil support system is a dynamic stochastic system, for properly simulating the operation process of system, obtaining the quantitative optimization results for decision support, and improving the quality and efficiency of oil security decision. The author used simulation and optimization technology to imitate and analyze the question of oil transportation from sea to land based on the perspective of system optimization. Two subsystem models of landing field oil support were established, the system model of GPSSW program were compiled and solved, a variety of quantitative results were obtained to describe the essence of the system. The results show that the research can provide important decision support for the landing field oil support and provide an efficient and practical analysis method for the oil support effectiveness evaluation of landing field.