Abstract: It is a common phenomenon in the process of enterprise management that the supply chain takes up capital. This paper discusses the influence of net capital occupation of supply chain on the degree of tax planning from the perspective of tax planning motivation.It is found that there is a significantly positive correlation between the net capital of supply chain and the degree of tax planning.Further research shows that the positive marginal effect of supply chain net capital on tax planning is greater for enterprises with equity incentive for financial personnel; high cash flow risk will amplify the positive impact of supply chain net capital on tax planning. This paper enriches and expands the relevant research on the influence factors of enterprise tax planning, and provides reference for the government to effectively reduce the tax burden of enterprises in the process of supply side reform.

Key words: capital occupation in supply chain；tax planning, cash flow risk, equity incentive for financial personnel