Electric turnover headrest capable of being adjusted up and down

The invention discloses an electric turnover headrest capable of being adjusted up and down. The electric turnover headrest comprises a headrest assembly, a bottom plate which is connected with the backrest framework; a rotating mechanism assembly which comprises a rotating support arranged on the bottom plate in a sliding mode, wherein rotating arms are arranged on the two sides of the rotating support in the sliding direction respectively, one end of each rotating arm is rotationally arranged on the rotating support, and the other end of each rotating arm is connected with the bottom of a headrest inserting rod of the headrest assembly; a sliding block which is arranged on the rotating support in a sliding mode, wherein the sliding block is connected with the rotating support through a first transition connecting part, and the sliding block is connected with the pair of rotating arms through a second transition connecting part; and a linear motion driving device which is connected with the sliding block so