The present invention relates to a multifunctional partial discharge signal generation device. The multifunctional partial discharge signal generation device comprises an embedded processor being connected with a power supply module and a human-computer interface; and the embedded processor is characterized in that the embedded processor is connected with an ultrahigh frequency simulation signal output end through a drive circuit and a high-voltage pulsed discharge module in order, the embedded processor is connected with a ground voltage simulation signal output end through a first DDS module, a first low-pass filter and a first amplification circuit in order, the first amplification circuit is connected with a first gain switching circuit, the embedded processor is connected with a supersonic wave simulation signal output end through a second DDS module, a second low-pass filter and a second amplification circuit in order, and the second amplification circuit is connected with a second gain switching circuit. The ultrahigh frequency, ground voltage and supersonic wave simulation fault signals can be generated through one device to achieve systematization and integration and improve the usage convenience.