Abstract: It is an urgent task at present to utilize resources of Yangtze River scientifically and reasonably and implement continuous development in the economic region along the riverThis paper makes a special research on the status and evolution trend of water environment in Yangzhou section of the Yangtze River and puts forward a measure concerned to bring it under control by total amount control,especially make a breakthrough on pollution analysis and control countermeasure for non point source based on a vast amount of monitoring data and basic material collectedThe evaluation and forecast methods,determination of patternin flow & water quality and design condition,calculation on pollution effect in key section and mixed area of blowoff port etcused in this paper have higher learning and practical valueIt is significant for the protection of water environment and ecological environment,and provides basis for the research on water environment protection of Yangtze River and inspiration for water quality protectionThis technology has good value in application and dissemination.

Key words: straw resource, distribution, density, per capita share, utilization situation.