广西北海市由于社会经济的高速发展，对水需求量日益增加，而水体污染又日益加重，因此未来北海市水资源短缺与水环境恶化问题，将会制约北海市经济的发展。本文运用地下水优化开采理论和灰色预测方法进行了水资源供需分析，对北海市地下水资源与可持续发展的关系作了探讨。并提出了北海市地下水资源可持续利用的途径。 Due to the rapid socio-economic development in Beihai, Guangxi, demand for water is increasing day after day, while water pollution is aggravating day by day. Therefore, the problem of water shortage and water environment deterioration in Beihai will restrict the economic development of Beihai in the future. This paper analyzes the supply and demand of water resources by using the theory of groundwater optimization and gray prediction, and discusses the relationship between groundwater resources and sustainable development in Beihai. And put forward the way of sustainable utilization of groundwater resources in Beihai.