Based on the data of listed companies in Shanghai and Shenzhen stock exchanges from 2007 to 2017, this paper empirically tests the impact of marketization of loan interest rate on financial asset investment behavior of enterprises.The study finds that the marketization of loan interest rate significantly promotes the financial asset investment behavior of enterprises, which is mainly because the marketization of loan interest rate enables enterprises to obtain more long-term funds for financial asset investment.It is further found that the marketization of loan interest rate has an effect on enterprises with less financial asset investment behavior. And the marketization of loan interest rate makes enterprises more inclined to invest in long-term financial assets. When the macro-economy is more depressed, the marketization of loan interest rate promotes the financial asset investment of enterprises.However, the degree of monetary policy easing has no significant effect on the relationship between the two. The conclusion of this paper can reveal the relationship between the marketization of loan interest rate and the financial asset investment behavior of enterprises,and provide new micro-level evidence for further investigating the economic consequences of the marketization of loan interest rate and more targeted prevention and control of the real enterprise from the real risk to the virtual risk.