The invention relates to a wellhead skin effect electric heating device. The underground part of a wellhead pipeline is provided with a waterproof thermocouple, and the wellhead pipeline is connected with a wellhead valve set. The bottom end of the wellhead valve set is connected with a power source connection point I, the outer surface of the power source connection point I is provided with a power cable protection pipe I, and a power cable I connected with the power source connection point is mounted into the power cable protection pipe I and connected into an electric cabinet. A power cable II and a power source cable extend out of the electric cabinet, and the outer surfaces of the power cable II and the power source cable are sleeved with a power cable protection pipe II and a power source cable protection pipe correspondingly. The wellhead skin effect electric heating device is used for wellhead skin effect electric heating.