Abstract: The change regularity of different density cotton individual and group nutrition growth and reproduction growth based on the experience resulted by using the planting pattern of the 3 kinds of high density and conventional pattern on cotton.Show as a result: Along with the increase of planting density, individual growth weakens , and the growth of group encrypts with spacing in the rows( 261000 plants / hm2 ) pattern is the most strong, expression group knot bell number is much , has highest yield. In yield forms ,the medium－inferior bell of cotton make up 85% of the total yield always more, and internal surround bell of cotton make up 90% of total yield always. according that should choose the variety of the branched type of compact Ⅰ 、 Ⅱ kind of plant type, medium fertility field is planted with the pattern of the encryption of spacing in the rows (plant population was 261000 plants / hm2 ) ,It is expected to realize more ideal output by strengthening manage and promoting knot bell more in medium－inferior .