Abstract: This paper studies that different planting density is influence of growth, quality and yield of the Hybrid Sorghum ＂ sweet 1 ＂. The results show that on different planting density, growth and decline of plant tillering number is Obvious in early growth stage, plant height, stem diameter, proportion of stem and leaf, leaf area, photosynthetic pigment content and dry matter accumulation show significant differences in the late; quality, biological yield and sugar content influence by planting density is big, the biological yield increased significantly between treatment （ P〈0.05 ）. Comprehensive analysis show that planting density is 116700 strains/h2, spacing is 10cm× 60cm, can better coordinate collective growth between group and individual ,biological yield and nutrient content have reached a higher level.