Water -gathering eco -agriculture i s the agricultural development model,which suits the features of the natural sources of the semi -arid reg ions in the northwest,and the joint t o combine improving ecological environ-ment and raising the production of th e land.By using the key measures,whi ch make benefits to both of them,not only the poverty -alleviation of farmers can be realized,but also the eco logical environment can be restored and re -constructed gradually.Finally,the sustainable development of agriculture can be realized.