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Based on the natural and geographic environment of Suzhou City,the paper had introduced its water resources condition,rainwater collection system and quality.By taking the Youth Activity Center and new eco-museum in the industrial park,Suzhou Agricultural School and vegetable farm in Jinlv District for example,rainwater utilization in Suzhou City had been investigated and its laws and regulations been explained.On this basis,it had discussed Suzhou rainwater utilization planning,analyzed rainwater utilization planning of squares,urban roads,residential areas,public architectures and eco-parks,utilization of replenished landscape water at riparian and waterfront belts,and ecological agricultural land construction.It hoped to reduce the load of rainwater pollution,improve the water environment of Suzhou City and further release the demand pressure for excellent water resources through implementing rainwater utilization system and reducing the threat of flood step by step.