The present invention discloses an SF6 spark discharge device. The device comprises a charging circuit connected with the first end of a selective switch, and the second end of the selective switch is connected with one end of an energy storage capacitor; the control end of the selective switch is connected with a switch controller configured to control the conduction of the first end and the second end of the selective switch or the conduction of the second end and the third end; a discharging circuit comprises a sealed spark discharge air chamber which has a pneumatic valve and is installed at the side wall, and the discharging circuit comprises a high-voltage guide rod and a low-voltage guide rod respectively penetrating two ends of the spark discharge air chamber; one end, located at the outer portion of the spark discharge air chamber, of the high-voltage guide rod is connected with the third end of the selective switch, and the other end, located at the inner portion of the spark discharge air chamber, of the high-voltage guide rod is provided with a discharge high-voltage electrode; one end, located at the inner portion of the spark discharge air chamber, of the low-voltage guide is provided with a discharge low-voltage electrode, and there is a spark discharge gap between the two discharge electrodes; and a signal collection circuit comprises a voltage collection device, a current collection device and a waveform display. The SF6 spark discharge device can control the frequency of generating spark discharge and the energy of spark discharge each time to facilitate the subsequent SF6 spark discharge analysis.