Abstract: 【Objective】 To explore the effects of planting modes and DPC on the structure and function of cotton under the condition of replanting.The results are of great significance for guiding the light and simplified cultivation of cotton in southern Xinjiang and the optimal plant type of cotton picked by machine. 【Methods】 The interaction experiment between Yuanmian 11 planting mode and DPC was carried out in Shaya County, Aksu Prefecture, Xinjiang.The planting mode was set at 76cm equal row spacing, (66 + 10) cm wide and narrow rows, and the dosage of DPC was set at 288,408,543 g / hm²,3 levels. 【Results】 The 76 cm planting pattern with equal row spacing could accelerate the growth process of post-disaster reseeding cotton, advance the opening of bolls, advance the peak leaf area per plant, advance the transfer of vegetative growth to reproductive growth of cotton, and its plant type could meet the standard of machine harvesting, and the yield and quality were also improved.The internode length, specific leaf weight and photosynthetic product accumulation of leaves were significantly decreased by increasing DPC application, which ultimately increased cotton yield. 【Conclusion】 Comprehensive analysis shows that planting with 76 cm equal row spacing and spraying 543 g/hm² DPC in the whole growth period of cotton can promote cotton early maturity and get better yield, while DPC could be applied 408 g/hm² in (66+10) cm planting pattern.