A protection circuit used for vacuum tube spark striking

The utility model discloses a protection circuit used for vacuum tube spark striking. The protection circuit used for the vacuum tube spark striking is characterized in that according to the protection circuit, a mutual inductor and an energy storage capacitor is connected in a parallel mode into in a loop of a power supply and a vacuum tube, and a switch module is in series connection in a loop of a charging power supply and the vacuum tube. Because of the adoption of the above structure, the protection circuit used for the vacuum tube spark striking can effectively prevent damages to the vacuum tube due to over-currents or spark striking; the detection is convenient; The protection is rapid; and production and reconstruction costs are relatively low.