The invention discloses an arrearage power-outage early-warning device. The device comprises an information converter and an early-warning prompt switch; the information converter is arranged at one side of an electric energy meter and electrically connected with the electric energy meter; the early-warning prompt switch is arranged at a back end of an entrance main switch of a user side, and theoutput end of the early-warning prompt switch is electrically connected with an illumination loop. The function of the device disclosed by the invention is to notify a user to pay the electric chargethrough the prompt warning and outage warning when the balance of the electric energy meter is insufficient, and the running of each of a refrigerator, an air-conditioner, a computer and like important home appliances on the socket cannot be influenced since only the illumination loop is turned off in the power outage.