The utility model relates to an electrified detector sensor fixed device of partial discharge, the sensor fixer of device passes through universal joint and insulator spindle linkage, when using, the detection angle of adjustment universal joint in order to change the sensor, the sensor that will fasten in the sensor fixer through the insulator spindle is close equipment under test in order to realize the detection. Unnecessary contact between existing field test personnel and the electrified equipment shell can effectively be avoided to this disclosed device, and testing personnel grips insulating operating handle can measure check point super high and narrow and small region with sensor subsides in measurement station surface, has improved the person and the equipment safety of electrified detection.