This paper introduces the concept of dominance degree in ecology and constructs a model of the dominant degree of inbound tourism flow gathering and dispersal in Chinese provinces and cities along the Belt, and Road advocated based on the optimization of the entropy value method. In order to further analyze the model, the obtained tourism flow gathering and dispersal dominance degrees are first integrated into a fuzzy set of tourism flow gathering and dispersal dominance degrees. The natural sequence of fuzzy numbers is obtained by screening the fuzzy set, and the fuzzy indexes are obtained after the distribution fuzzy calculation, and finally, the evaluation model of tourism flow gathering and dispersal advantage degree is constructed based on the index matrix and the combination assignment method. After analysis, it is obtained that the inbound tourism distribution of Chinese provinces and cities along the route from 2005 to 2020, the fourth tier of provinces and cities increased, the proportion by 41.02%, the number of the third tier decreased, the proportion decreased to 29.33%, and the uneven distribution of the advantage of inbound tourism distribution was strengthened.