In the context of “One Belt，One Road” Initiative，the construction of CBD in China’s first tier cities faces a fresh opportunity. In this paper，it attempts to examine and summarize the growth mechanism of London as a global financial centre by virtue of the perspective of financial geography，which is based on the case of the City of London’s regeneration after the financial reform of ‘Big Bang’. In a globalizing world economy，the definition of financial centre undergoes a shift along with the emergence of global production and financial network，which gradually highlights the flows and network between differential financial centers rather than an emphasis on financial agglomerations at the local scale by highlighting the characteristics of openness and internationalization. As a global leading financial centre，the City of London’s mechanisms perfectly match the evolutionary of financial centre and contribute to the financial reinvention since 1980s. These mechanisms of financial centre growth probably provide some inspiration for the development of CBD in China.