As a regional economy，the Guangdong-Hong Kong-Macao Greater Bay Area needs to coordinate resource allocation. Water resources are the focus of regional economic development planning and river basin water resource management.

This report describes the security situation of water resources in the Guangdong-Hong Kong-Macao Greater Bay Area and the current situation of strengthening water resources security in two directions：analysis of the correlation between policies，status quo and problem analysis. The economic development of the Greater Bay Area needs to be put in the first place in the future. At the same time，the competent authorities at various levels in the Greater Bay Area who are responsible for formulating water resources allocation plans to coordinate with the needs of local economic development and do a good job in water resources planning and allocation. To improve the linkage between water sources in the region，to solve the current problem of coordinated deployment of different water sources. This report analyzes the corresponding relationship between the construction modes and development history of the three major international bay areas：New York Bay，San Francisco Bay，and Tokyo Bay and the Guangdong-Hong Kong-Macao Greater Bay Area. The pressure brought by the development，and according to the forecast，propose reasonable planning and formulation of economic development goals according to the characteristics of the city，attach importance to and use economic leverage to improve the effect of water resources management，and bring into play the advancement of science and technology to exploit the results of water environment protection and restoration And so on.