In order to filter out the noise effects of Vacuum Switches Arc(VSA)images, enhance the characteristic details of the VSA images, and improve the visual effects of VSA images, in this paper, the VSA images were implemented pre-processing such as noise removal, edge detection, processing of image’s pseudo color and false color, and morphological processing by MATLAB software. Furthermore, the morphological characteristics of the VSA images were extracted, including isopleths of the gray value, arc area and perimeter.