Abstract: A liquid crystal display and a rotating device thereof are proposed. A liquid crystal screen of the liquid crystal display is supported by a stand and can be rotated clockwise and counterclockwise with the use of the rotating device being connected to a back side of the screen. In application of a positioning portion of the rotating device in cooperation with positioning holes formed at the back side of the screen, the screen can be maintained in position by the engagement between the positioning portion and the positioning holes, or can be rotated by separating the positioning portion from the positioning holes, in a manner that the screen is prevented from colliding a base of the stand.