The invention discloses an automatic film-wrapping device for a lead-acid storage battery box. The automatic film-wrapping device for the lead-acid storage battery box comprises a lead-acid storage battery box conveying line, wherein a lead-acid storage battery pushing mechanism which is used for pushing lead-acid storage battery boxes towards the lead-acid storage battery box conveying line is arranged on an inlet side of the lead-acid storage battery box conveying line; a film passing gap for a film to pass is formed between the lead-acid storage battery box pushing mechanism and the lead-acid storage battery box conveying line; an automatic film conveying mechanism is arranged above the film passing gap; a film head clamping device is arranged below the film passing gap; a pair of film guiding rolls arrayed vertically is arranged at the front end of the lead-acid storage battery box conveying line; the upper film guiding roll is positioned above a conveying plane of the lead-acid storage battery box conveying line; and the lower film guiding roll is parallel and level to the conveying plane of the lead-acid storage battery box conveying line. The automatic film-wrapping device for the lead-acid storage battery box is simple in structure and low in cost.