The purpose of the invention is to provide an insulator charged detection tool. By contacting an insulator through two detection columns, a detection meter can detect current and voltage data. Thus, the insulator can be detected. The positions of the detecting columns can be adjusted to adapt to insulators of different specifications. An operating lever is set for operation. The operating lever can be connected with a lengthening bar through a connector. A magnifier assisting in observation is arranged on the front side of the detection meter. An extension bar is arranged to connect a cleaningbrush to clean dust on the surface of the insulator. During use, a regulating block is pushed and fixed to the position of a limiting block at the back to clean dust. When there is no need to clean dust, the regulating block is pushed and fixed to the position of a limiting block in the front. An insulator can be well detected. The insulator charged detection tool is suitable for electric power construction and maintenance.