The development of the capital market will face challenges. Promoting the optimization of the capital market in the guangdong-hong kong-macao (CHM) Greater Bay Area (GBA) with the development of emerging FT is not only of practical significance to the development of the GBA, but also of great significance to promoting the country's overall economic competitiveness and realizing modernization. In the context of the rapid development of FT, the practical and theoretical significance of capital market optimization in the CHM GBA is analyzed. The new generation of FT means such as big data, cloud computing, artificial intelligence, blockchain, and Internet payment are the mainstays of CHM University. Possibilities analysis of Bay Area capital market optimization offers. Based on this background, this paper conducts research on the innovative development of capital markets in CHM based on financial technology (FT).This paper mainly studies the status quo of financial support for technological innovation in the CHM GBA, summarizes the main practices of financial support for technological innovation in the three major bay areas in the world, and draws the following points: First, it is necessary to establish a ST innovation system according to the national conditions of a country. financial support system. Second, policy finance plays a guiding role in the initial stage of ST innovation activities. Third, commercial banks play an important role as a booster in technological innovation activities. Fourth, a sound credit guarantee system provides a strong guarantee for technological innovation. Fifth, developed venture capital and perfect multi-level capital market can effectively speed up the development of ST innovation.