Auxiliary device for definition and safety of automobile data recorder

The invention discloses an auxiliary device for definition and safety of an automobile data recorder. The auxiliary device comprises a work box, a work cavity is formed in the work box, the automobiledata recorder is fixedly connected to the inner wall of the rear side of the work cavity, and a lens is arranged on the right end face of the automobile data recorder. A shading polarizer is adjustedthrough an adjusting mechanism when an external light source is too strong to guarantee the shooting definition. The shading polarizer is made to ascend and descend through the external light sourcesensed by an auxiliary lifting mechanism. A memory card of the automobile data recorder is automatically protected through a protection mechanism when an automobile is subjected to excessive externalforce, so that damage is prevented, and subsequent search is facilitated. Power is transmitted for operation of the whole device through a power mechanism, the definition and safety of the automobiledata recorder in the using pr