Promoting a higher level of financial openness is not only the need for the current development of the financial industry but also the requirement for deepening the financial supply-side reform and achieving high-quality economic development. The Beijing Stock Exchange aims to serve the type of Specialized，Refinement，Differential，and Innovation（SRDI）enterprises，and achieves a new pattern of high-level financial openness through its unique path. The establishment of the Beijing Stock Exchange will continue attracting foreign venture capital funds to invest in Chinese SRDI enterprises，promote the participation of qualified foreign investors in capital market transactions，and enhance the internationalization of China’s capital market. The Beijing Stock Exchange constitutes the basic framework of the multi-level capital market and provides a reform plan to solve the dilemma of corporate innovation based on high-level financial openness，and prepares for the further realization of a new pattern of high-level financial openness. The ultimate success of the Beijing Stock Exchange is inseparable from the linkage of policies and mechanisms to achieve high-level financial openness，and it has successfully practiced the specific central-local policy linkage path of high-level financial openness. The Beijing Stock Exchange will become another important milestone of the capital market reform due to its unique service targets and the late-mover advantage in financial mechanism design.