Along with the dwarfing of the newly bred cultivars and innovation of the farming system, the planting density of the multiple cropping oil sunflower has been on a trend of increase in the production. The results of the study of the dense planting cultivation showed that the proper dense planting could increase the values of the related groups' physiological parameters closely related to the yield, was conducive to the synthesis and accumulation of the photosynthetic products and was good for the increase of production. The production investigation and cultivation practices shows that the dense planting cultivation of the multiple cropping sunflower is feasible, and the key points of the dense planting cultivation technology has formed.%随着育成品种的矮化及耕作制度的创新，生产上复播油用向日葵种植密度呈增大的趋势。油葵密植栽培研究结果表明，适当密植可增加与产量密切相关的有关群体生理参数的数值，有利于光合产物的合成与积累，对产量的提高是有利的。生产调查及栽培实践表明，复播向日葵密植栽培是可行的，并形成了密植栽培技术要点。
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