Abstract
It is an urgent problem for Chinese large and medium-sized ports to improve their competitiveness. With the method of system dynamics and the software Vensim-PLE, the simulation model of port competitiveness is constructed to explore the internal factors influencing mechanism and development trend of port competitiveness. By constructing causality diagram and system flow diagram, the paper analyzes the influence mechanism of related factors on port competitiveness. Taking Nanjing Port as the specific research object, it predicts the change trend of cargo throughput and other related variables and port competitiveness. Then it designs four simulation schemes to improve the port competitiveness of Nanjing Port ,and compares the improvement effects of different schemes. Finally, it puts forward some countermeasures and suggestions to improve port competitiveness.