The invention discloses a positioning device of a storage battery. The positioning device comprises a rack, conveyer belts, a jacking device, limiting blocks, a mold and an interception device. A jacking block at the lower parts of the conveyer belts passes through a jacking hole and jacks a storage battery on the conveyer belts into the mold upwards; and the upper surface of the storage battery is matched with a groove in the inner side of the mold, so that accurate positioning of the storage battery is finished; and accurate installation of a connection terminal is facilitated. When the jacking block jacks the storage battery upwards, an interception block at a discharge opening of the rack passes through the jacking hole and is jacked to the upper parts of the conveyer belts upwards, so that the jacked storage battery is prevented from further moving along with the conveyer belts; and when the storage battery is transported on the conveyer belts and the storage battery is jacked into the groove in the inner side of the mold, the storage battery easily dumps towards the side surfaces of the conveyer belts, and the storage battery can be effectively prevented from dumping towards the side surfaces through the limiting blocks. These structures are combined together, so that an assembly line of installing the connection terminal is formed; and the installation efficiency of the connection terminal is greatly improved.