The invention discloses an electronic paper display device which comprises a drive substrate and electronic paper, wherein the electronic paper is arranged on the drive substrate; the drive substrate comprises a pixel pattern layer, and the pixel pattern layer comprises crosswise-arranged grid lines and data line as well as a plurality of pixel units defined by the grid lines and the data line; each pixel unit comprises a pixel electrode, and the pixel electrodes of every two adjacent pixel units are respectively prepared from different conductive layers; and the pixel electrodes of every twoadjacent pixel units are partially overlapped, and a dielectric layer is arranged between the pixel electrodes at the overlapping parts. The electronic paper display device is high in display aperture ratio.