The utility model relates to an electric energy disturbance signal processing technique field is an electric energy disturbance analysis appearance based on improve S transform, including power module, adc and digital signal processor, power module's output is connected with adc's input and digital signal processor's input electricity respectively, and adc's input electricity is connected with signal conditioning circuit, and adc's output is connected with digital signal processor's input electricity. The utility model discloses an electric energy disturbance analysis appearance simple structure, it is rationally distributed, the utility model discloses a drawing key feature frequency point, only adding the DPSSW window to the characteristic frequency point and operate, the amount of calculation is few, and efficient and the practicality is strong. The time characteristic frequently of improving that S transform institute is in luck frequently that the matrix result can the various disturbances of expression directly perceived, effectual, classification speed is fast, does not have the mistake and divides, refuses branch region, suitable embedded realization.