Abstract: A thermo bag heating device includes a housing internally defining a through receiving space; a heating basket being an open-topped hollow thermal conductive container disposed in the receiving space for receiving a thermo bag therein for heating; and a heating element wound around an outer surface of the heating basket for heating the same when an amount of electric current is supplied to the heating element. The heating element is serially connected at an end to a temperature controller and a fuse, and is connected via a control circuit board to a timer for setting duration of heat, a control switch for controlling on/off of the heating element, and a buzzer and a plurality of indicator lamps for emitting warning sound and light, respectively. A metal foil is wound around the heating basket to cover and locate the heating element in place while providing a heat diffusing effect.