This communication guarantee box can store 20 interphones at the same time, and is equipped with 20 interphone backup battery storage card slots to facilitate management and storage; The charging base of 20 walkie-talkies has the function of fast charging, which can charge 20 sets at the same time, or single set of charging, and is equipped with a large capacity carp battery to continuously charge the equipment, reduce the waiting time for the equipment to charge, and improve the operation efficiency.