Abstract: The coordinated development of Guangdong, Hong Kong and Macao has become a major national strategy. The Party Central Committee and the State Council have always attached great importance to the planning and design of Guangdong, Hong Kong and Macao Bay area. In the process of the coordinated development of Guangdong, Hong Kong and Macao, in order to build a world-class Bay area and a world-class megalopolis, we should give full play to the unique effect of fiscal policy and fiscal behavior leverage, especially through the in-depth cooperation of fiscal behavior to promote the leapfrog integrated development of the bay area. On the basis of exploring the evolution law of intergovernmental financial behavior, this paper studies the urgency and particularity of financial cooperation among Guangdong, Hong Kong and Macao, and then constructs the operation mechanism and implementation path of financial cooperation among Guangdong, Hong Kong and Macao, so as to promote the high-quality and high-speed development of Guangdong, Hong Kong and Macao.

Key words: guangdong,Hong Kong and macao bay area, financial behavior, financial competition, financial cooperation