From the view point of ecological,debris flow is taken as a kind of disastrous environment, which is one of elements of ecological (nature) - social - economic system. Hence, It is only by restoring and rehabilitat-ing the stablity, harmony and sustainable development of the complex ecosystem,but not by using one-sided un-derstanding and mechanical countermeasures,that the aim of debris flow prevention can come true. Compared with the current understanding of debris flow and its prevention measures, this paper emphasizes ecological ideas. Method of ecological-economic zoing is applied to a debris flow basin which is divided into 5 eco-economic zones: (1)warm temperate belt.,arid valley degraded shrub-hassock/fruit-crop complex and local resident eco-eco-nomic zone, (2)temperate belt,low mountain,semi-arid degraded ecology and mountain hazards/Zanthoxylum-crop complexand local resident eco-economic zone, (3)temperate belt, semi-humid middle mountain, secondary needle-broad leaved mixed forest/forest-Chinese medicinal herbs complex eco-economic zone, (4) cold temperate restoring sub-alpine needle-leaved conserving water forest/forestChinese medicinal herbs complex eco-economic zone, and( 5) sub-cold belt., sub-stable alpine meadow/grassland animal busbandry eco-economic zone. At last, reg-ulating measures are put forwards for each zone, including Agricuture Forestry,Pratacuturae and engineering, etc..