[目的]研究不同供水量与施磷量对甘蔗经济性状的耦合效应。[方法]以广西甘蔗品种新台糖22号(ROC22)为材料,通过供水量设置3个水平,在甘蔗分蘖初期至伸长末期,每旬供水量分别为199.5m3/hm2(A1)、400.5m3/hm2(A2)、600.0m3/hm2(A3);磷肥施用量设置4个水平,作为基肥分别施用P2O50kg/hm2(B1)、120kg/hm2(B2)、240kg/hm2(B3)、360kg/hm2(B4),来研究不同供水水平与磷肥水平组合处理对甘蔗产量和品质性状的影响。[结果]处理A2B2为较适合提高甘蔗经济性状的水磷配比处理。[结论]该研究结果为广西甘蔗生产中的水分、磷肥高效利用及甘蔗高产、高糖栽培提供理论依据。 [Objective] The research aimed to study the coupling effect of different water supply and phosphorus application on economic traits of sugarcane. [Method] With the sugarcane variety ROC22 in Guangxi as material, three levels of water supply were set. The water supply at the early tillering stage to the end of extending stage was 199.5m3 / hm2 (A1) and 400.5m3 /hm2(A2),600.0m3/hm2(A3). Four levels of phosphate fertilizer were applied as basal fertilizer and P2O50kg / hm2 (B1), 120kg / hm2 (B2), 240kg / hm2 (B3) and 360kg / hm2 (B4) to study the effects of different combinations of water supply and phosphate fertilizer levels on the yield and quality traits of sugarcane. [Result] Treatment A2B2 was more suitable for improving the economic traits of sugarcane water and phosphorus ratio treatment. [Conclusion] The results provided the theoretical basis for the high utilization of water and phosphate fertilizer and sugarcane high yield and high sugar cultivation in sugarcane production in Guangxi.