Display method and device suitable for windowing of large screen

The invention discloses a display method and device suitable for large-screen windowing, and the method comprises the steps: enabling a plurality of sending cards to configure a spliced screen at the maximum resolution and increasing the aspect ratio line by line according to the first resolution of the spliced screen and the first aspect ratio of the spliced screen; acquiring a first starting point coordinate of the window, width and height of the window and a plurality of second starting point coordinates of the plurality of sending cards; according to the first starting point coordinate, the plurality of second starting point coordinates and the width and height of the window, calculating to obtain a plurality of image cutting sizes required for displaying the window; and according to a plurality of image cutting sizes and the plurality of second starting point coordinates, selecting a corresponding sending card to transmit the image of the window to the splicing screen so as to carry out window display. B