aking as the case study of the mountainous area of southern Ningxia,we have amended several parameters of AZE , Doorenbos,Chikugo, Miami, Thornthwaite Memorial models according to the crop and the natural environmental factors of the mountainous area of southern Ningxia and reckoned the photo temperature productive potential y(Q,T), the climatic productive potential y(Q,T,W), the amount of needed water Em and the amount of the insufficient water El of spring wheat. The main results are listed below: y(Q,T) is about 6.85～8.06 t /ha, y(Q,T,W) is about 2.22～5.32 t/ha, Em is about 340～450mm, El is about 70～300 mm. The amount of the insufficient water El in jointing stage and ear pregnant stage is specially serious. The above reckoned results all are conformed with its actual situation. In this region, the sustainable development strategies such as cumulating the rain water for irrigation i.e. using natural precipitation into available resource, increasing the basic cultivated area and improving water use efficiency etc. should have to be adopted.