Lithium ion battery non-aqueous electrolyte and lithium ion battery

The invention provides a lithium ion battery non-aqueous electrolyte and a lithium ion battery. The lithium ion battery non-aqueous electrolyte comprises a composite lithium salt, a non-aqueous solvent and additives, the additives comprise a lithium salt additive, a silane additive and a sulfite additive, and the composite lithium salt comprises lithium bis (fluorosulfonyl) imide and an auxiliary salt. By regulating and controlling the formula of the electrolyte, the lithium salt additive and the silane additive have a synergistic effect, the problem of aluminum foil corrosion caused by high-content lithium bis (fluorosulfonyl) imide in the battery circulation process is solved, and a stable SEI film can be formed on the surface of a positive electrode material. In order to further reduce the film-forming impedance and change the SEI film structure, a sulfite additive is introduced, so that the ternary positive electrode material system meets the performance requirements of low-temperature power, high-tempera