Zhejiang Province is located in the more economically developed southern flank of the Yangtze River Delta, since the reform and opening up, the province's economy and society have undergone great changes, the total economic output and per capita gross domestic product GDP growth rate among the country's forefront. Water resources is an important basic resource, and social and economic development is closely related. Zhejiang Province, water resources by the uneven spatial and temporal distribution of limitations, population distribution, economic layout and water resources do not match the conditions, with the development of the local industrial economy, the lack of water resources will increasingly constrain the development of the economy, in order to maintain the sustainable development of the economy, to solve the problem of insufficient water resources has been a matter of urgency. The use of recycled water can increase the source of water, can be completely as a "second source of water" in the water resources planning to be considered.