Che structure, functions and characteristics of economic ecosystem in l}}udinghe watershed as well as the deteriorative causes of ecoenvironment have been analysed in this paper, It vvas pointed out that the causes to make heavy economic loss are 'the irrational economic structure and longterm discord of economic system and ecosystem,In. order to transform the ecosystem into a favourable circulation gradually,and to achieve the coordinated development and synchronous improvement of the economic ecosystem，the author put forward the control strategies in Wudinghe watershed,