The Wenchuan earthquake area is one of the typical vulnerable areas in our country.Its vulnerability is quite evident on account of the seismically triggered geo-hazards like debris flow and landslide

variable geography remarkably different in height and wet climate

and human activities.In the light of the analysis which involves the factors

16 indexes including productivity of water

land use ratio

farmland area per person

topography and geomorphology

geological hazard degree

social economic development level

etc.are selected in order to set up an assessment index system.The system consists of four grades by DARE(decision alternative ratio evaluation)method and weighted ecological frangibility degree in evaluation index.Results show that ecological vulnerability is the strongest in the core of Longmen Mountains fault zone and Qinba Mountains

the stronger in the western plateau

moderate in piedmont plain

and the weakest in east hilly region.The influences of the landuse status and the distribution of earthquake induced disasters on ecological environment are analyzed.Result from the evaluation is important to guide economica1 development and ecological environment construction in the Wenchuan earthquake area.