The invention relates to an anti-parching device for a drinking device, which comprises a control circuit and a heating circuit, wherein the heating circuit comprises a heating container and an electric heater; the control circuit comprises a sensing lead circuit, a voltage comparator, a switch triode, a relay and the like; the sensing lead circuit is provided with one or two sensing leads which are connected into the heating container, and a reference water level is set; when the water level in the heating container is higher than the reference water level, after the signal voltage is compared by the voltage comparator, a high level is output, the switch triode is switched on, and the normally open contact of the relay is switched on, thereby controlling the electric heater to be switched on for heating; and when the water level in the heating container is lower than the reference water level, after the signal voltage is compared by the voltage comparator, a low level is output, the switch triode is switched off, and the normally open contact of the relay is switched off, thereby controlling the electric heater to be switched off for stopping heating. AC220V commercial power is used for supplying power to the anti-parching device for the drinking device.