The invention discloses a device capable of quickly replacing batteries. An upper bin and a lower bin are arranged in a shell, battery channels are arranged in the corresponding bins, and the upper channel and the lower channel are connected, so that the batteries can be placed as multiple as possible through the relatively small space. In addition, multiple permanent magnets and electromagnets are arranged at the bottoms of the channels at equal intervals, and each permanent magnet and one electromagnet form a combined unit. Through an awakening device arranged on a battery inlet, drive electromagnets in the batteries are awakened, the permanent magnets and the electromagnets which are arranged at the bottoms of the channels at equal intervals induce the drive electromagnets on the roundbatteries, and therefore the round batteries can roll automatically in the battery bins. By the adoption of the device capable of quickly replacing the batteries, the action of putting on the batteries full of power and the action of replacing the batteries short of power are conducted synchronously, the battery replacing efficiency is improved, and the battery replacing time is reduced.