The utility model provides an electric installation is tested to insulated isolation, is including testing electric installation, insulating boot, characterized by: install in the insulating boot and test the electric installation, test the electric installation and include: testing electric sensitive adjust knob, test electric vocal ware, test the battery and testing the electroluminescence lamp, insulating boot one end has the guard ring, and the insulating boot other end has the sealed cowling, and the soft plastics connecting band is installed to the insulating boot, soft plastics connecting band fixed connection clip, the clip internal surface be provided with the sawtooth, the insulating boot be hollow ellipsoid, the surface is provided with anti-skidding line, the insulating boot is made by insulating material. The isolation of live conductor can be realized to this device, as long as in inserting the insulating boot with the live conductor, the live conductor is kept apart in the insulating boot promptly during the use, plays the safety protection effect to the staff.