In order to provide scientific basis for rational close planting and management of Cotton production in south Xinjiang, the study has been made in this experiment on the regulation for Xinhai 14 to accumulate dry–matter in different period and density by random arrangement and indoor weighting. The result shows that the regulation follows logistic curve. The rational density is helpful to the dry-matter accumulation in later periods. The suitable density of Xinhai 14 should be 270,000/hm2 in south Xinjiang.
