The present invention relates to An electronic osmotic dehydrator of electrophoresis style with a phase control using three-phase current, and more specifically, to An electronic osmotic dehydrator of electrophoresis style with a phase control using three-phase current, which can minimize an unnecessary loss of power consumed in the rotating drum itself by emboding the applying structure of the DC power supplied to the dehydrating domain of the electro-osmotic dehydrator so that a strength of the electric field generated between the rotating drum and the caterpillar may be variably controlled depending upon a sludge volume, and improving a structure of the rotating drum to which the DC power is applied, when forming an electronic osmotic dehydrator comprising a rotating drum in the cylindrical form, a caterpillar running on an endless track at a certain space from the rotating drum and two filter cloth belts for transferring and dehydrating the sludge as wound between the drum and the caterpillar, which is a continued invention of ‘an electro-osmotic dehydrator (K.R. Patent Application No. 10-2004-007759)’, ‘an electro-dehydrator of a phase control type (K.R. Patent Application No. 10-2005-009928)’, and ‘an electro-osmotic dehydrator (K.R. Patent Application No. 10-2007-046494)’ which were already filed by the applicant of the present invention.