A backlight module and a display device are provided. The backlight module includes a back plate, an optical film, a light guide plate, and a fixing component. The optical film is provided at a light exiting side of the light guide plate, the back plate includes a bottom plate and a side plate located at least one end of the bottom plate, and the light guide plate is provided between the optical film and the bottom plate. The fixing component includes a first fixing subcomponent provided on the side plate and a second fixing subcomponent provided on the optical film, the first fixing subcomponent being clamped with the second fixing subcomponent.