The invention provides an anti-overcharging additive used for a lithium battery electrolyte, and the lithium battery electrolyte comprising the additive, and relates to the technical field of the lithium ion battery. The anti-overcharging additive mainly consists of biphenyl, phenylcyclohexane, diflurodiphenyl, fluorobenzene and lithium difluorophosphate, wherein the biphenyl, phenylcyclohexane and diflurodiphenyl are used as electrical polymerization type compounds, so that a cell can have corresponding over-charging additives for reaction in different voltage sections in an over-charging process constantly; meanwhile, by virtue of interaction of fluorobenzene and phenylcyclohexane, the electrical polymerization film forming impedance degree of phenylcyclohexane in a low voltage section can be lowered; by adding lithium difluorophosphate, increasing of impedance caused by voltage section micro film forming in normal use of the cell due to addition of the over-charging additives of biphenyl, phenylcyclohexane, diflurodiphenyl, fluorobenzene, and the like can be lowered; and furthermore, the lithium battery electrolyte comprising the anti-overcharging additive can block thermal breakdown possibly caused by overcharging in a mild manner, so that performance degradation of the cell in the overcharging condition can be further avoided.