The invention discloses a wide-screen film display mode identifying method and device. The method comprises the steps of acquiring an image to be displayed, determining a first image, displayed in a first area of a display screen, of the image to be displayed and a second image, displayed in a second area of the display screen, of the image to be displayed, and obtaining pixel gray scale values of pixels of the first image and the pixel gray scale values of pixels of the second image. The first area is previously determined and located in an area at the top of the display screen, and the second area is previously determined and located in an area at the bottom of the display screen. If an average pixel gray scale value of all the pixels in the first image and the second image is lower than a first threshold value, the image to be displayed is judged to be displayed in a wide-screen film display mode. In addition, the first threshold value is previously set and is larger than 0.