Water resources and environmental problems brought about in developing and using them in the Jing-Jin-Bo Area are an important them of socio-economic development in the area.The condition of natural geography is briefly described and the water resources in the area is preliminarily calculated in the paper. According to the statistics,total amount of average annual water resources is 12,967 million m³ and the amount of average annual available water resources is 8,713 million m³ in the area which is one of the regions in shortage of water resources in China.Environmental problems brought about in developing and using water resources (conspicuous contradiction between supply and demand, frequent drought or excessive rain, surface subsidence and water pollution) are elucidated on the basis of the analysis of temporal and spatial distribution characteristics of water resources.Some suggestions for rationally using and protecting water resources are presented. This paper can be used for, agricultural regionalization and regional planning in the area.