The invention discloses organic electrolyte capable of improving low-temperature performance of a lithium manganese battery. A main salt of a lithium salt is lithium perchlorate, an auxiliary salt of the lithium salt is selected from lithium hexafluorophosphate, lithium tetrafluoroborate, lithium trifluoromethanesulfonate, lithium bis(oxalate) borate,lithium bis(trifluoromethanesulphonyl)imide, lithium bis(fluorosulfonyl)imide, lithium oxalyldifluoroborate and lithium iodide; an organic solvent is a mixed solvent of cyclic esters, linear esters, ethers and sulfones; an additive is selected from an additive A and an additive B, wherein the additive A is selected from benzoic acid, phenylacetic acid, benzoic anhydride, phthalic anhydride, m-phthalic anhydride and terephthalic anhydride, and the additive B is selected from 2,6-di-tert-butyl-4-methylphenol, tert-butylhydroquinone and butylated hydroxyanisole. By adopting the organic electrolyte, the low-temperature discharging performance of the lithium manganese battery can be obviously improved, and the application range of the lithium manganese battery can be effectively enlarged.