Lithium ion battery non-aqueous electrolyte and lithium ion battery

The present invention provides a lithium ion battery non-aqueous electrolyte and a lithium ion battery, the lithium ion battery non-aqueous electrolyte comprises an electrolyte, an organic solvent and a composite functional additive, the composite functional additive comprises an additive A and an additive B, the additive A comprises fluoroethylene carbonate, ethylene sulfate, allyl-1, 2, 4-trimethyl-1, 3-pentanediol monoisobutyrate, and the additive B comprises fluoroethylene carbonate, ethylene sulfate, allyl-1, 2, 4-trimethyl-1, 3-pentanediol monoisobutyrate and an organic solvent. The additive A comprises any one or a combination of at least two of 1, 3-sultone or methylene methanedisulfonate, and the additive B comprises at least one of compounds shown in a formula 1. The lithium ion battery using the electrolyte can solve the problems of low cycle performance capacity retention rate, poor storage performance and the like of a high nickel silicon carbon system of the lithium ion battery. 本发明提供一种锂离子电池非水电解