The invention provides an anti-disengagement device for a charging plug of a new energy automobile, which effectively solves the problem that a safety coefficient of a charging pile of an existing newenergy automobile is not high, and the charging plug is easy to fall off when a charging gun is inserted or pulled out, thereby even causing an electric shock accident. A technical scheme for solution is that: the device includes a rectangular charging hole on an electric vehicle; a horizontal charging gun plug is disposed in the charging hole; a main body block is disposed in the charging hole;through grooves are disposed on the main body block; first rectangular holes are disposed on an external circular surface of the main body block; the first rectangular holes are communicated with thethrough grooves; second rectangular holes are formed on the main body block; the second rectangular holes are communicated with the through grooves; and a first bevel gear is disposed in each of the through grooves, first end face cams symmetric with each other are fixed on upper and lower end faces of each first bevel gear, a rectangular block is separately disposed in each of the first rectangular holes and each of the second rectangular holes, and a second end face cam is disposed on each rectangular block. The device is ingenious in structure, effectively prevents the charging plug from being accidentally kicked and accidentally hit during a charging process, thereby causing the charging plug to fall off, avoids electric shock accidents, is wide in applicability, and is easy to popularize.