At present，most of the improvements in the electrostatic field depiction experiment are limited to the plane，mainly discussed at the one-dimensional and two-dimensional level，and there are very few experiments on three-dimensional space depiction，and only some of the improvements in this area are not intuitive enough to analyze the plane data and then stretch the body through software．However，the distribution of the electric  field around the charged body is usually three-dimensional space，in order to make students more intuitive understanding and study the distribution of the electrostatic field in space，this experiment takes the threedimensional module design as the core，in the electrostatic field depiction，the three-dimensional module is mainly composed of related auxiliary components，through experimental operations，the asymmetrical structure of the three-dimensional electrostatic field is accurately positioned and depicted．