Abstarct: ABSTRACT Sustainable Development of entrepreneurship could be comprehensively analyzed using a simulation model for entrepreneurship ecosystem baxsed on the system dynamics approach. Thus, a complete analysis of the entrepreneurship ecosystem is of high importance. However, an effective analysis of entrepreneurship ecosystem involves many challenges, such as the presence of several factors which interact with each other in various ways with different complex effects in time. Therefore, the approach used in this study is employing analysis of entrepreneurship ecosystems in sports industry using analysis of dynamic systems. This study is the type of a mixed research. Thirteen experts in the field of entrepreneurship (entrepreneurs and researchers) participated in the qualitative phase, and 15 experts in the field of entrepreneurship who were selected in a targeted method participated in the quantitative phase. A semi-structured interview served as the data collection method for the qualitative part of the study, while a questionnaire created by the researcher was used to gather data for the quantitative section. 193 basic themes, 25 organizing themes, and 6 inclusive themes were found in the qualitative section using the theme analysis method. The inclusive themes covered market possibilities, money, business and legal infrastructure, physical infrastructure, sports entrepreneurial prospects, and business environment quality. The results of the quantitative part of the study revealed that the commercial and legal infrastructures are more significant than other identified themes and that the quality of the business environment is the minimum significant factor influencing the sports entrepreneurial ecosystem. In the second part of the research, several applied issues such as entrepreneurship opportunities, infrastructures, market opportunities and entrepreneurship space in the borders of the dynamic model developed baxsed on the literature and experts’ opinion. Finally, a set of strategies baxsed on experts’ opinion are ranked with the objective of improvement of evaluation measures using network analysis decision-making approach and fuzzy TOPSIS. The results obtained indicate the important role of sports entrepreneurship opportunities, sports tourism, market opportunities, entrepreneurship infrastructures and entrepreneurship-oriented environment in the development of sports entrepreneurship infrastructure in Iran. The credibility and efficiency of the proposed model for analysis of sports entrepreneurship have been ultimately shown. As a result, the development of the entrepreneurial ecosystem requires the preparation of cultural and social fields, the cooperation of educational systems, administrative and financial structures, and other support mechanisms. Therefore, it is necessary for all institutions, devices and institutions and practitioners to work coherently and in accordance with the mixtures arising from the systemic approach with all the available power and potentials in order to educate, promote and develop it at the level of all laxyers and strata of the society.