Backlight module and display device

The invention discloses a backlight module and a display device. The backlight module comprises a frame body, a light guide plate and a lamp strip, wherein the light guide plate is positioned on the frame body; the lamp strip is positioned on a light entering side of the light guide plate; the bottom of the side, which is close to the lamp strip, of the light guide plate is fixed to the frame body; the frame body comprises at least one first through hole; the edge of each first through hole is provided with a through hole wall which is protruded out of the surface of the frame body; the lightguide plate comprises second through holes which are in one-to-one correspondence to the first through holes; the through hole wall of each first through is inserted in the corresponding second through hole; a gap exists between the through hole wall of each first through hole and the through hole wall of the corresponding second through hole; and the width of the gap between the through hole wallof each first through hol