A backlight module, comprising: a back plate comprising a bottom plate and a side plate provided at at least one end of the bottom plate; a light guide plate provided on the bottom plate and comprising a light exiting surface; an optical film provided at the light exiting surface of the light guide plate; a fixing component comprising a first fixing subcomponent and a second fixing subcomponent; wherein the first fixing subcomponent is provided on the side plate, the second fixing subcomponent is provided on the optical film, the first fixing subcomponent and the second fixing subcomponent being cooperated to fix the optical film; wherein the first fixing subcomponent comprises a fixing structure fixedly provided at the side plate and a positioning structure connected with the fixing structure; and the second fixing subcomponent comprises a lug formed at at least one end of the optical film integrally, each lug being provided with at least one through hole, and the positioning structure passing through the through hole; characterized in that said side plate is provided with a first opening through which said fixing structure is fixedly provided, and in that the fixing structure comprises a first strip structure passing through the first opening, and a second strip structure and a third strip structure respectively located at two sides of the side plate, the second strip structure being connected with an end of the first strip structure away from the light guide plate, the second strip structure being attached to the side plate, the third strip structure being connected with another end of the first strip structure near the light guide plate, and the third strip structure being attached to the side plate. a back plate comprising a bottom plate and a side plate provided at at least one end of the bottom plate; a light guide plate provided on the bottom plate and comprising a light exiting surface; an optical film provided at the light exiting surface of the light guide plate; a fixing component comprising a first fixing subcomponent and a second fixing subcomponent; wherein the first fixing subcomponent is provided on the side plate, the second fixing subcomponent is provided on the optical film, the first fixing subcomponent and the second fixing subcomponent being cooperated to fix the optical film; wherein the first fixing subcomponent comprises a fixing structure fixedly provided at the side plate and a positioning structure connected with the fixing structure; and the second fixing subcomponent comprises a lug formed at at least one end of the optical film integrally, each lug being provided with at least one through hole, and the positioning structure passing through the through hole; characterized in that said side plate is provided with a first opening through which said fixing structure is fixedly provided, and in that the fixing structure comprises a first strip structure passing through the first opening, and a second strip structure and a third strip structure respectively located at two sides of the side plate, the second strip structure being connected with an end of the first strip structure away from the light guide plate, the second strip structure being attached to the side plate, the third strip structure being connected with another end of the first strip structure near the light guide plate, and the third strip structure being attached to the side plate.