Financial support is an important policy factor affecting the development of cultural enterprises.First of all, this paper decomposes social capital of entrepreneurs into political relationship capital and business relationship capital and then establishes an econometric model to analyze the impact of social capital of entrepreneurs on financial support availability of cultural firms based on the survey of 178 cultural firms in Jiangsu province.According to the results, political relationship capital of entrepreneurs has a positive impact on financial support availability of cultural firms, which is not statistically significant; business relationship capital of entrepreneurs has a significantly positive impact on financial support availability of cultural firms, and the impact of business relationship capital of entrepreneurs is obviously larger than the one of political relationship capital of entrepreneurs, showing that when local governments consider whether to give financial support to culture firms or not, they obviously weaken the traditional way of allocating subsidy funds mainly by using administrative power and basically abide by the principle of allocating public financial resources through market mechanism.