Based on the analysis of the fragile ecosystem characteristics and its causes in the hilly region,Taihang Mountain,this study suggests that developing ecological agriculture is an important way to solve environmental and economic problems and fulfill regional sustainable development.In addition,according to different forms of ecologic land suitability,we puts forward corresponding development patterns of ecological agriculture and its key techniques,such as ecoeconomy protective forest model,highly effective and intern sive ecological agriculture model,the model of comprehensive control of ecological environment,ecological homestead model,agricourism model,and plant resource diversity conservation model.We also propose that the key step for realizing sustainable agricultural development is to restore and maintain bi