Based on the theory of corporate life cycle，the article follows the law of the growth cycle of unicorn companies. First，the development stages of unicorn companies are divided into germination，development，explosion，and maturity stages，and unicorns are analyzed at each stage The development characteristics of enterprises and their financial needs. Following this，the article sorted out and condensed the policy experience of Beijing to cultivate and promote the growth of unicorn enterprises. Finally，based on the research on the above two aspects，and combining the financing environment of Beijing unicorn enterprises，the article puts forward suggestions for optimizing the financial support system for fostering unicorn enterprises in Beijing. The research in this article can provide a reference policy experience for optimizing the growth and financing environment of unicorn companies.