The electrolytic cleaning process was studied in view of simulation. It is supposed that remaining dirt on surface of strip is evenly distributed before electrolytic cleaning with thickness of d, a bubble (radius of r) generated from strip can remove dirt with the volume of 4πr2d, and in the process of a bubble generated the thickness of the dirt (d) keeps invariant. Under the premise of simplified conditions, taking Faraday’s Law as a starting point main model had been built. And so expressions of the relations between process parameters and decontamination ratio were obtained. The results of experiment accord with those of simulation. Based on the model, using mixed program of Matlab and Visual C++, the simulation program software was developed. The results show that the way to simulate original electrolytic cleaning process of cold rolled strip is feasible.