In order to clearly display the effect of the factors impacting the cohesive force of dust for electrostatic precipitator,some simple expressions are assumed as quantifies,and a few variables are used to describe the changing trends of various forces,so the effect caused by the change of one of the affecting factors on the adhesive force of dust can be directly determined.The three-dimensional images produced by MATLAB language are used to show the trends of cohesive force of dust,the showed results are in accordance with the theoretical analysis,it provides a way to visual identify individual factor how to affect the overall cohesive force of dust.