The project of converting slope farmland into forest and grassland has greatly influenced evolutionary trend in the agricultural eco2economic system of Wuqi County.The income structure of crop farming:animal husbandry∶parergon∶forestry changed from 31.5∶7∶10.5∶1 in 1990 to 3.4∶3.2∶3.4∶1 in 2006.The landuse structure of cultivated land ∶forest land ∶artificial grassland evolved from 1∶2∶5 in 1999 to 1∶14∶10 in 2006.Based on the above result,the 8 indexes of population,crop farming income,forestry income,animal husbandry income,industry income,per capita net income,yield of grain,and forest coverage were chosen.Cluster analysis method was used for the discussion on the evolvement stage of agricultural eco2economic system of Wuqi County.Results show that 1990 - 1996 was the incipient stage of the second stage ; 1997 - 2002 was the mid2latter of the second stage ; and 2003 - 2006 was the initial stage of the third stage.In view of the existing problems,it is necessary to adjust forest structure,develop forest (grass)and related industries,train labor service,and increase labor output for the purposes of promoting the sound interaction in the agricultural eco2economic system and realizing agricultural resources and industrial optimization coupling.