The invention relates to a vehicle-mounted display screen and a backlight module thereof. The backlight module comprises a lamp panel, a lampshade, a lens, a lower iron frame and a middle iron frame. The lower iron frame is connected with the middle iron frame, and the lamp panel, the lampshade and the lens are all arranged between the lower iron frame and the middle iron frame. The lamp panel is arranged in the lower iron frame, and a plurality of
LED lamp beads are arranged on the face, back on to the lower iron frame, of the lamp panel. The lampshade is connected with the face, back to the lower iron frame, of the lamp panel, a plurality of lamp grooves are formed in the lampshade, a first lamp hole is formed in the bottom of each lamp groove, each
LED lamp bead penetrates through the corresponding first lamp hole to be located in the corresponding lamp groove, and the lens is connected with the face, back to the lamp panel, of the lampshade. Independent partition of the
light source can be achieved through the arrangement of the lampshade, the light channeling phenomenon among all the areas is improved, the display effect of the backlight module is more uniform, and the effect of improving the uniformity of the backlight module is achieved. In addition, the combination of the lens and the lampshade can also play a role in improving lamp shadows, apertures, bright and dark bands and other undesirable phenomena, so that the optical display quality of the backlight module is improved.