The invention relates to an insulator resistance live detection device, which comprises a detection device body. The detection device body is provided with a probe, a touch screen, an USB interface, a measuring switch and a headphone jack. A lower end of the detection device body is provided with a connecting rod A, and the connecting rod A is connected with a fixed splint plate through a convex shaft A. The fixed splint is connected with an adjusting bolt through a thread through hole, and the adjusting bolt is provided with an adjusting button on one side. The lower portion of the fixed splint is connected with a connecting rod B through a convex shaft B, and the lower end of the connecting rod B is connected with an extendible insulating pole. The USB interface is connected with a power module, and the USB interface is connected with a micro controller through a signal line, wherein the micro controller is connected with the touch screen through the signal line. The micro controller is respectively connected with a high voltage generating module, a power frequency filtering module and a filtering processing module, wherein the filtering processing module is connected with a signal acquisition module through a signal amplification module, and the micro controller is connected with an antenna. The detection device has the advantages of comprehensive function, convenient operation and wide application range.