The southern of Xinjiang has experienced the Replacement of 5 times, the breeding of high yield varieties has played an important role, compared with the early vareties,new varieties are increasing with the velocity of 12.1kg/ha per year,. To production ,the Contribution of Improved varieties is 43.9%.The total tedency of evolve in lint percentage, per plant boll number and weight is increasing In agriculture Characteristic , the per plant height drop , width increase , the reproduction quantity of self-breeding varieties was lower, loss rate is higher, the composite quality in southern of Xinjiang has less change, especially the producing quality of cotton has not undergo a Fundamental change.There are larger selecting potential of southern Xinjiang's cotton in these facets : per plant ball numbers , increase flowers , cut down the falling rate , plant width,first branch , selection of high photosynthesis varieties and fiber strength . In the early ripening cotton variety breeding process in South Xinjiang cotton varieties in the early history of development, high-quality, big ball, adaptability of superiority and rational utilization of introduced varieties of disease resistance, high yield, plant type, grade, loose culture is strong wait for an advantage to expand the genetic basis of cotton varieties in Xinjiang.