In order to improving the quality of water environment and increase water use efficiency, promoting and speeding up the reclaimed water facilities construction is a main measure in the northern cities with a shortage of renewable water in China. Urban reclaimed water planning is a strategic, special and comprehensive layout which involving a wide range of water management and development. Based on the analysis of the necessity of reclaimed water using and planning, the authors focused on the basic principles that reclaimed water planning should be followed and described the main elements that should be included in reclaimed water planning. As reclaimed water has played a significant role in Beijing’s existing water supply picture and its continued development is critical to meeting the growing water needs in the capital. With Beijing’s case studies a potential users selection principle of reclaimed water was presented.