Leakage protection device and electric appliance

The embodiment of the utility model provides a leakage protection device and an electric appliance comprising the same. The leakage protection device comprises a power supply circuit, the power supply circuit comprises a grounding end, a field-effect tube, a boost converter and an inductor, the grounding end is used for connecting a cathode of a battery, a source electrode of the field-effect tube is used for connecting an anode of the battery, a grid electrode of the field-effect tube is used for connecting an external power supply, and a drain electrode of the field-effect tube is also used for connecting the external power supply. The inductor is connected with the boost converter in parallel; and the power supply input end of the detection circuit is connected with the output end of the boost converter. The leakage protection device can work under the power supply of an external power supply. When the external power supply cannot supply power, the power supply circuit can utilize the battery as a standby