Backlight module and display device

The invention relates to a backlight module and a display device. The display device comprises the backlight module and a display panel arranged in front of the backlight module. The backlight modulecomprises a first frame, a light guide plate, a light bar, a positioning structure and at least one optical diaphragm, wherein the positioning structure is provided with a positioning plate and at least one limiting bump; the positioning plate extends laterally to pass through the outer side of the light bar and extends to the outer side of the light emitting surface of the light guide plate; thelimiting bump is arranged on the first frame or/and the positioning plate, and extends between the light guide plate and the light bar; and the height of the limiting bump is greater than that of a light emitting diode of the light bar. Therefore, the limiting bump can position the light guide plate, so that the light guide plate does not collide with the light bar to effectively prevent the lightbar from being damaged, an