LED display module and display screen

The utility model relates to the technical field of LED display, in particular to an LED display module and a display screen. An LED display module comprises LED lamp beads, a PCB lamp panel and a bottom shell. One end of the PCB lamp panel is arranged on the bottom shell, the LED lamp beads are arranged at the other end of the PCB lamp panel, the PCB lamp panel comprises a light limiting layer and a light insulation layer, and the light insulation layer is arranged on the light limiting layer; the light limiting layer comprises a light limiting groove, the light insulation layer comprises a light insulation groove, and the light limiting groove is formed in the light insulation groove. Wherein the LED illuminating lamp bead is arranged in the light limiting groove, the LED display lamp bead is arranged on the light insulation layer, an optical path difference exists between the two kinds of lamp beads, the light limiting groove and the light insulation groove are arranged, the display screen can illuminate a