The embodiments of the application provide a backlight module and a displaying device, relating to the technical field of display. The backlight module comprises a first support structure, an optical film material and a buffer structure; the first support structure is arranged on a side away from a light-outgoing side of the optical film material, and the first support structure and the optical film material have a through-hole; the buffer structure comprises a first buffer portion arranged in the through-hole, and a rigidity of the first buffer portion is less than a rigidity of the first support structure. The backlight module is internally provided with the buffer structure, and the first buffer portion in the buffer structure is arranged in the through-hole that penetrates through the first support structure and the optical film material.