A method of making an LED display includes fabricating an LED display screen cover using a light-permeable material, positioning the LED display screen cover over an LED display screen body having an array of LED pixel units each including a respective LED lamp, and securing the positioned LED display screen cover to the LED display screen body. The fabricated screen cover includes a plurality of cover units arranged in an array of multiple rows and multiple columns. Each cover unit includes a convex outer surface and an inner surface, the outer convex surfaces of adjacent cover units are configured and joined along the columns and rows, and the inner surfaces of the adjacent cover units are separated from each other. Each cover unit in the LED display screen cover is positioned on top of a respective LED lamp of the LED display screen body.