The invention discloses a non-aqueous electrolyte. The non-aqueous electrolyte comprises the following constituents based on mass: 10-20 parts of compound shown in structural formula (I), 5-12 parts of other lithium salts, 2-5 parts of 1,4-butanediol sulphate, 10-12 parts of adiponitrile, 15-25 parts of pimelicdinitrile, 10-15 parts of octanedinitrile, 8-20 parts of sebaconitrile, 20-40 parts of 4-fluorine-1,3-dioxolane-2-ketone, 5-10 parts of ethylene carbonate, 2-5 parts of propylene carbonate, 5-12 parts of fluoroethylene carbonate, 4-8 parts of carbonated hydroxybenzene olefin ester, 3-5 parts of overshoot resistant additive, 0.5-1.5 parts of flame retardant agent and 1-2 parts of hexamethyl disilazane or triphenyl phosphate. The lithium salts containing oxalate radial groups also can form a solid-state electrolyte membrane on the surface of a positive electrode, the high-voltage resistant performance of a battery can be improved; and the lithium salts containing the oxalate radial groups are friendly to an environment, and the environment cannot be polluted due to the electrolyte problem during disassembly and recycle of the battery.