本文归纳了两个点电荷电场中的场强和电势在特殊方向上随所在位置的变化关系的图像特点及性质,并对有关双电荷电场的图像问题进行归类分析. This paper summarizes the image characteristics and properties of the field strength and potential in two points of charge electric field with the change of the position in a special direction, and classifies the image problems related to the electric double electric field.