der to probe into the possibility of China’s cotton production expansion to the northwest regions,based on analyzing climate and irrigation condition of cotton production in Gansu,Shaanxi and Shanxi provinces,this paper uses the main ingredients analytical method to comprehensively evaluate the cotton production technological and economical conditions in 14 cotton production provinces.The result shows that Gansu province,Shaanxi province and Shanxi province belong to the best dominant,the better dominant and ordinary cotton production areas respectively.Hence,a conclusion is drawn that Gansu province can be consolidated to become another dominant cotton production district besides Xinjiang Uygur Autonomous Region,Shaanxi province can be stabilized to become the main cotton production area,and Shanxi province is not suitable to expand cotton production any longer.