To further the reform of business environment，speed up the construction of economic and trade rules system in line with high international standards，and create a business environment with global competitiveness are the requirements for further enhancing the attractiveness and cohesion of the Great Bay Area to global capital，talents and institutions，enhancing the driving force for development，and building an international first-class bay area. Based on a comprehensive summary and analysis of the current situation of the business environment in Guangdong-Hong Kong-Macao Great Bay Area，this report clarifies the existing problems and issues，puts forward ideas and countermeasures for further deepening the reform of the business environment，in order to deepen the cooperation between Guangdong，Hong Kong and Macao，enhance the level of market integration，accelerate the formation of a new pattern of comprehensive opening up and establish an open economy.