The invention relates to an automatic connecting line connection-assisted formation device for lead storage batteries, and aims at solving the problems of heavy workload and low work efficiency due to the fact that a worker is needed to manually connect a plurality of storage batteries into one path in series in existing storage battery formation. The automatic connecting line connection-assisted formation device comprises a formation tank for located placement of the plurality of storage batteries, a plurality of connectors and a lifting mechanism, wherein the plurality of connectors are mutually connected in series in advance and can be in contact with terminals of all storage batteries; the lifting mechanism is used for driving the connectors to automatically lift and can achieve automatic series connection of all storage batteries; the connectors are mutually connected in series in advance, all storage batteries are into one path in series once the connectors are in contact with the terminals and the storage batteries do not need to be connected in series by using a wire or a data collection line; the connectors are driven by the lifting mechanism to achieve lifting; and after the storage batteries are placed in a located manner, the connectors descend to be in contact with the terminals of the storage batteries for formation, so that the whole series connection work is automatically achieved, a manual operation is not needed, the labor intensity of the worker is reduced, the workload is reduced, and meanwhile, the work efficiency is improved.