Abstract: Planting density,pruning method,growth and development about planting caster have been studied in this trail based on the climate and cultivation condition of Ningxia irrigation area.The results are height and main spike height of caster increase,but stem diameter,spike length and effective number of branches and spike decrease with high density of planting caster.It means that high density effect caster on individual development and economic yield which are affected by lower density.So the appropriate planting density of caster is 784 /667m^2,planting distance is 85cm×100cm.