The invention provides a voice data visualized method after an ultrasonic discharging detection signal is processed. The method comprises the following steps: firstly, processing voice data stored in a detector to obtain a discrete time-domain chart, wherein the first one is a primary ultrasonic spectrogram obtained carrying out FFT (Fast Fourier Transform) and frequency translation to the discrete time-domain chart, and the second one is a primary ultrasonic amplitude phase diagram obtained by carrying out absolute value processing and low-frequency re-sampling to the discrete time-domain chart. According to the voice data visualized method provided by the invention, an ultrasonic data statistical atlas can be obtained to be convenient for intuitively displaying data, and analyzing the reason of partially discharging an insulating medium of power equipment.