Abstract: Density has less effection on the growth period, bolls weight and gin turnout except the height ,leaves number,shedding rate of buds and bolls, number of effective bolls and wadding,Which is that, as the density of Xinhai 14 increase, the height get short, leaves number reduce, shedding rate of bolls increase.And shedding rate of bolls is more than buds.The results of the test showed that the suitable density is around 270,000/hm2 in south Xinjiang.