Abstract: Saline lakes covered half of the total lake area in China and some of them were already in the state of eutrophication. Aiming at salinity, which is the characteristic physical and chemical factor of water environment, the relationship between salinity and primary productivity in lakes was systematically formulated. The research suggested the potential role of salinity as limiting briny biologic community. It not only impacts the growth and metabolism, physico-chemical constituent and nutrient (nitrogen, phosphorus) absorption, but also affects protein expression level, antioxidant enzyme activity and toxin production, etc. Therefore, it was suggested that, in the study of saline lake eutrophication, the relationships between salinity, algae and nutrient (nitrogen, phosphorus) should be further analyzed through experimental researches and statistical analysis, so as to further explore the possibility of bringing salinity into the nutrient criteria system of saline lakes.