The present invention relates to a film covering device for a battery, which comprises a fourth base, a battery commutation mechanism, a film covering mechanism, a lower end film pressing mechanism and a pressed film conveying line. The battery commutation mechanism, the film covering mechanism, the lower end film pressing mechanism and the pressed film conveying line are arranged on the fourth base. The discharge end of the battery commutation mechanism is docked with the pressed film conveying line. The pressed film conveying line successively runs through the film covering mechanism and thelower end film pressing mechanism. The battery commutation mechanism is used for adjusting the battery from horizontal placement to vertical placement. The film covering mechanism is used for covering the vertical battery with the film. The lower end film pressing mechanism is used for hot pressing of the lower end face of the battery which is covered with the film. The invention is provided withthe battery commutation mechanism, the film covering mechanism, the lower end film pressing mechanism and the pressed film conveying line, realizes the streamlined operation of film covering and lamination, reduces manual participation and improves the work efficiency.