The components of Hotting Resistance in cutting area and its mearsuring method in EHM are put forward in this paper. Further more, the relation between Hotting Resistance in cutting area and cutting parameters is studied and analysed. As a result, we point out that Hotting Resistance in cutting area could be used as a parameter to distinguish cutting state. So, the auotmatic control of hotting current could be progressed on the basis of this result.