The invention relates to an LED color display screen building method based on surface color screening, which comprises the following steps of: placing all display box bodies used for splicing the display screens in a fixed area in a dark room, taking pictures at the center of the display box bodies by using a camera, carrying out corresponding naming on each photo and the corresponding display boxbody; selecting photos with a number equal to the number of columns on the display screen and similar colors as any row of the photo array; arranging all the photos into the photo array with the samenumber of rows and columns of the display box bodies on the display screen according to a sequence of the colors darkening from top to bottom by suing the color of the row as a reference, so that thecolor difference of the colors of two photos which are adjacent up and down does not exceed the recognizable range of human eyes; finally, building the display screen by using the display box bodiesaccording to the arrangement sequence of the photos in the photo array. According to the invention, the problem of color inconsistency on the surface of the display screen is effectively solved, meanwhile, the building time is shortened, and the production cost is reduced.