The utility model relates to a battery steel shell sealing device, which comprises a pressure sealing device and a shaping device. The pressure sealing device is composed of a frame, a transmission vertical shaft, and a transmission sleeve, a crimping assembly, an upper cylindrical cam, a cover sealing assembly and a lower cylindrical cam which are concentrically inserted into the transmission vertical shaft, and the central gear of the transmission sleeve and The planetary gears at the top end of the upper insert of the crimping assembly are engaged, the crimping assembly with the mold, the cover assembly and the transmission gear are fixed on the vertical shaft of the drive, and the upper cylindrical cam and the lower cylindrical cam are tight It is installed on the rack. The shaping device is composed of a machine base, a transmission main shaft, an upper cam and a cover pressure assembly, a top pressure assembly and a lower cylindrical cam which are concentrically inserted into the transmission main shaft; the cover pressure assembly, the top pressure assembly and the transmission with the mold The gear is fixed on the drive spindle, and the upper cam and the lower cylinder cam are fixed on the base. The utility model can cover, rotate and seal the battery tightly and firmly, thereby greatly improving the explosion-proof, storage and safety performance.