After the treatment of different densities of transplantation when use irrigation control technology, the results are as follows: transplanting standard is 30㎝×13㎝, 3 plants per cave, that is to say ,when the densities of transplantation is 76.5 thousand plants per ha, the light penetration of the population and the leaf area indes are the best , that is the best density when use irrigation control technology in Yinchuan irrigated area.