This paper reviewed on the studies of improving saline-sodic soil technology using desulfurized gypsum in the past few years, with a view to clear it's effect by analyzing alleviating impact of constraint factors from soil physical and chemical properties, soil microbial activities, enzymic activities, in addition of salt tolerant plants growing. The results showed that significantly effects exists on soil salt content, ESP, soil porosity, AEC, TMA, soil enzyme activities and plant survival rate, root activity, photosynthetic, WUE,yield and quality. It’s applying amount was from 22 500 kg/hm2 to 37 500 kg/hm2,depending on ESP, soil depth and bulk density. The improving measurement should be combined with soil conditioner applying, manure, tillage, irrigation, and salt tolerant plants to increase it’s effect.%综述近年来利用脱硫石膏改良盐碱地的研究进展，从土壤理化性质、微生物活性、土壤酶活性以及耐盐植物反应等方面，分析盐碱地障碍因子消减的改良效果。脱硫石膏改良盐碱地在土壤全盐、碱化度、孔隙度、胶体离子代换量、微生物活性、土壤酶活性、植物成活率、根系活力、光合及水分利用效率、产量与品质等方面具有显著效果；适宜用量为22500~37500 kg/hm2，与土壤碱化度、改良土层深度、土壤容重等有关；使用时，应与土壤改良剂、有机肥、耕作措施、灌水、种植作物选择等化学、生物、农艺措施相结合，效果更好。
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