Non-Aqueous Electrolyte for Lithium Ion Battery and Lithium Ion Battery

In order to solve the problem of poor cycle performance (especially high temperature cycle performance) of the existing lithium ion battery electrolyte containing anhydride or anhydride derivatives, the disclosure provides a non-aqueous electrolyte for lithium ion battery. The non-aqueous electrolyte for lithium ion battery comprises a compound A represented by formula I and a compound B represented by formula II, In the structural formula I, Ris C2-C4 alkylene or alkenylene, or C2-C4 fluoroalkylene or fluoroalkenylene; In formula II, R, R, R, R, Rand Rare each independently selected from one of hydrogen atom, fluorine atom and C1-C5 group. The non-aqueous electrolyte for lithium ion battery provided by the invention is obtained by combining the compound A and compound B, so that the lithium ion battery containing the non-aqueous electrolyte has better cycle performance and high-temperature storage performance.