Lithium ion battery electrolyte and preparation method thereof

The invention relates to the technical field of lithium ion batteries, in particular to a lithium ion battery electrolyte and a preparation method thereof.The electrolyte is prepared from, by mass, 70%-85% of mixed organic solvent, 5%-15% of lithium salt and 10%-15% of additive, and the sum of the content of the components is 100%; the additives comprise a film-forming agent, an anti-explosion agent, a flame retardant and an acid and water removal agent, and the total content of the components is 100%. The lithium salt adopted by the invention is an organic lithium salt, has better recycling efficiency and higher conductivity, and is matched with the acid and water removal agent with the acid and water removal function for use, and the two are combined for use to generate a synergistic effect, so that long-term control on the moisture and acidity of the electrolyte is realized, the storage time of the electrolyte is greatly prolonged, and the service life of the electrolyte is prolonged. And the film-forming