The utility model discloses a hanging voltage-stabilizing power supply device which comprises a box body which is formed from an upper cover and a base which are glued or hinged with each other into a whole, wherein the inner surface of the base is provided with a transformer and a rectification voltage-stabilizing circuit board which is provided with electronic elements and is connected with the transformer, the transformer is provided with a power input conducting wire used for being connected with a commercial power supply, and the output terminal of the rectification voltage-stabilizing circuit board is provided with a power output conducting wire which is used for being connected with an electric appliance; one end of the upper cover is provided with a through hole from which the power input conducting wire and the power output conducting wire are threaded out to be respectively connected with the commercial power supply and the electric appliance; the bottom part of the base is provided with at least one hanging mounting plate. The utility model has the advantages of beautiful appearance, high safety, convenient use and low investment cost.