Light guide plate, backlight module and display device

A light guide plate for an edge-lit backlight module comprises a first recessed portion and a second recessed portion, wherein the first recessed portion is provided at a bottom of a light incident end of the light guide plate for accommodating a light source, and the second recessed portion is provided at a top of the light incident end of the light guide plate, corresponding to the first recessed portion, the light guide plate has a light incident surface at the light incident end, a light exit surface perpendicular to the light incident surface and a third surface perpendicular to the light incident surface and opposite to the light exit surface, the first recessed portion is formed at the light incident surface and the third surface, and the second recessed portion is formed at the light exit surface,

• wherein, in a direction perpendicular to the light exit surface, a sum of a depth of the first recessed portion and a depth of the second recessed portion is larger than a maximal thickness of the light guide plate.