The invention relates to an oscillatory wave local discharge detection waveform generating method and device. The method comprises the steps that cable physical parameters input by a user and local discharge waveform data are acquired; a first queue and a second queue which are the same are generated, and near endpoint storage units, far endpoint storage units, local discharge point storage units, contact storage sections and attenuation storage sections are delimited in the first queue and the second queue; identical waveform data are stored into the first queue and the second queue, and the waveform data stored in the first queue and the second queue are moved according to a preset queue moving rule; waveform data overflowed from the head of the first queue or the head of the second queue are received, and when the length of the overflowed waveform data is larger than the preset length, local discharge detection waveforms are generated through the overflowed waveform data. According to the oscillatory wave local discharge detection waveform generating method and device, the time needed for simulation in a hardware mode can be effectively shortened, and the hardware cost needed for simulation in the hardware mode can be reduced, and simulation efficiency of cable field detection can be improved.