A backlight module includes a substrate, a luminous source, an optical film, and a support structure, the luminous source is disposed on the substrate and is opposite to the optical film, the support structure is disposed between the substrate and the optical film, the support structure includes a base plate and at least two elastic support portions arranged at intervals, the base plate is disposed on the substrate, and the elastic support portions are disposed on a side of the base plate away from the substrate, and support the optical film.