The invention relates to the field of salt soda water processing, and particularly discloses a method for improving the nutritive value of lemon-flavored salt soda water. The lemon-flavored salt soda water is prepared from the following ingredients: soft sugar, salicornia europaea extract, food flavor, citric acid, sodium citrate, sorbitol solution, vitamin, carbon dioxide and purified water. According to the method for improving the nutritive value of the lemon-flavored salt soda water, edible salt is not directly used and is replaced by salicornia europaea extract, thus the problem that traditional salt soda water does not quench thirst due to having the salty and bitter taste can be solved. Moreover, the lemon-flavored salt soda water contains dozens of microelements such as calcium, potassium, magnesium, iron, iodine and the like, enzymes, cellulose, alkaloid and the like, which have significant effects on cancers, sinusitis, arthritis, hypertension, hypotension, low back pain, obesity, hemorrhoid, diabetes mellitus, thyroiditis, bronchial asthma, and bronchitis. According to the method for improving the nutritive value of the lemon-flavored salt soda water, the lemon-flavored salt soda water has a high health care value and a broad market.