The utility model discloses an automobile seat DVD audio and video system, which is arranged on a frame of a seat backrest, comprising a displaying screen, a supporting frame, and a shell, wherein the upper portion of the supporting frame is connected with the upper portion of the displaying screen by a rotating shaft, the shell is connected with the supporting frame, the lower portion of the supporting frame is provided with a lower clamper, and the upper portion of a buckle is provided with an upper clamper which is mutually meshed with the lower clamper. The upper and lower clampers are both arranged through a rotating shaft pin. The utility model is characterized in that the displaying screen is driven by the mutual mesh between the clamper on the buckle and the clamper on the supporting frame for the front and back angle rotation, and in a certain range, the DVD screen is adjusted to the random position and is fixed according to the need of a passenger, which utilizes the front and back multi-angle adjustment of the screen. The complete system could be independently assembled, which greatly improves the comfort of the passenger, is convenient for the seat general assembly, and is accordant with the safety requirements of the automobile.