The invention discloses a method and a device for detecting interference signals and local discharging signals of GIS equipment. The method and the device are characterized by splitting inner or peripheral sampling signals of the GIS equipment, calculating a ratio of average energy in each window to energy of adjacent windows to obtain an energy gradient sequence, and judging whether the sampling signals belong to interference signals or local discharging signals according to a maximum value of the energy gradient sequence. By virtue of the application of the method and the device, the interference can be filtered according to the characteristics of the waveform energy of the interference signals and the local discharging signals; the accuracy of the local discharging detection of the GIS equipment can be greatly improved.