The utility model discloses a device is taked care of with three frequency centers to separation of many partial discharge source, including the central special high frequency signal sensor of taking care of the unit and being used for gathering each partial discharge source superfrequency partial discharge's electromagnetic wave pulse signal, the center is taked care of the unit and is included multichannel AD synchronous converter, low -frequency range band pass filter, medium frequency band band pass filter, high band band pass filter and wave detector, the input of special high frequency signal sensor and multichannel AD synchronous converter links to each other, the output of multichannel AD synchronous converter respectively with low -frequency range band pass filter, medium frequency band band pass filter, high band band pass filter links to each other, low -frequency range band pass filter, medium frequency band band pass filter, high band band pass filter's output links to each other with the wave detector jointly. The utility model discloses can effectively realize the separation in a plurality of sources of discharging, can have the detection means when putting the source many innings as the scene, have the advantage that detectivity is good, separation efficiency is high, the witnessed inspections is convenient.