3 A。A novel electrical discharge truing/dressing (EDD) technology which could dress non-electrical super-abrasive grinding wheels such as resin-bonded diamond wheel and vitrified CBN wheel by means of covering electrical material on the surface of wheel was proposed. The principle of removing non-electrical bond during MEDD process was illustrated. The resin-bonded diamond wheel topographies prior and after electrical discharge dressing were observed by VH-800 3-D digital microscope. The results of electrical discharge dressing under different discharge current（ie）and discharge duration（te）were compared. Experimental results indicate that the proposed EDD method is applicable to non-electrical bond wheels. In addition, discharge current has direct influence on the wheel surface topography and the performance of diamond grains. As well as, pulse duration has less influence on the wheel surface topography. The experimental results also reveal that the appropriative discharge current（ie）in dressing resin-bonded diamond wheel process is less than 3A. 