In order to solve the problem of insufficient high-temperature cycle property and storage performance of a traditional Ni-Co-Mn ternary lithium ion battery, the invention provides a non-aqueous electrolyte of a lithium ion battery. The non-aqueous electrolyte comprises a solvent, a lithium salt and a compound, wherein the compound is shown in a structural formula 1 and/or a structural formula 2 which is shown in the specification, in the structural formal 1 and/or the structural formula 2, R1 and R2 are independently selected from substituted or non-substituted organic group with 1-5 carbon atmos. Similarly, the invention also discloses the lithium ion battery comprising the non-aqueous electrolyte of the lithium ion battery. With the non-aqueous electrolyte provided by the invention, thehigh-temperature cycle property and the high-temperature storage performance of the Ni-Co-Mn ternary lithium ion battery under high pressure can be effectively improved.