NOVELTY - Saline soil is tested and salinity is detected, such that if the salt content is 0.2-0.3%, then the salinity of the soil is mild, if the salt content is 0.3-0.6%, then the salinity of the soil is moderate, and if the salt content is more than 0.6%, then the salinity of the soil is high. Depending on soil salinity, preset amount of improved fertilizer and improved spraying liquid are applied on soil. After 25-40 days, subsampling of soil is carried out and basic conditions of the soil for plant growth and crop cultivation are analyzed.    USE - Water-saving improvement method of saline soil (claimed).    ADVANTAGE - The method efficiently provides saline soil with high moisture retention property and permeability, by accelerating brine discharging speed, reducing pH of soil, accelerating breeding of beneficial microorganism and promoting germination, with reduced water consumption.    DETAILED DESCRIPTION - Saline soil is tested and salinity is detected, such that if the salt content is 0.2-0.3%, then the salinity of the soil is mild, if the salt content is 0.3-0.6%, then the salinity of the soil is moderate, and if the salt content is more than 0.6%, then the salinity of the soil is high. Depending on soil salinity, improved fertilizer including 0.01-0.05 %mass effective-microorganism bacteria, 50-70 %mass organic fertilizer, 5-10 %mass perlite, 10-15 %mass vermiculite, 10-15 %mass peat, 3-5 %mass humic acid, 1-5 %mass compound fertilizer, 0.1-0.5 %mass rippers agent and trace elements, is applied on the soil, such that the content of improved fertilizer for mild salinity soil is 5-10 KG/m2, the content of improved fertilizer for moderate salinity soil is 10-15 KG/m2, and the content of improved fertilizer for high salinity soil is 15-20 KG/m2. Depending on soil salinity, improved spraying liquid comprising 7-10 %mass citric acid, 7-10 %mass nutrient solution, 20-45 %mass wood vinegar, 20-45 %mass N-(2-hydroxypropyl)methacrylamide, 7-10 %mass rooting solution, 7-10 %mass ferrous sulfate solution and other organic corrosion acid, is sprayed on the soil, such that the content of improved spraying liquid for mild salinity soil is 5-7 KG/ mu m, the content of improved spraying liquid for moderate salinity soil is 7-15 KG/ mu m, and the content of improved spraying liquid for high salinity soil is 15-20 KG/ mu m. After 25-40 days, the subsampling of soil is carried out using indicators and basic conditions of the soil for plant growth and crop cultivation are analyzed. If basic conditions of the soil for plant growth is not reached, the processes are repeated. The eligible salt content and pH of the soil for plant growth are 0.2% or less and 9 or less, respectively. Spraying liquid film on the soil, reduces soil moisture evaporation, maintains soil moisture and promotes plant germination and growth.