The invention discloses a breakdown arc-extinction circuit for a liquid-state food sterilizing processing chamber in a high-voltage pulse electric field. The breakdown arc-extinction circuit comprises a fundamental arc-absorbing circuit and an active arc-extinction circuit, wherein in the fundamental arc-absorbing circuit, a resistor and an inductor are connected in series in a bus main circuit of a high-voltage pulse electric field generator; meanwhile, a diode is connected with the inductor in an anti-parallel manner; in the active arc-extinction circuit, an electronic switch is connected with a food processing chamber in parallel; a photoelectric coupler and a current-limiting resistor form a thyristor driving circuit; a controller detects the magnitude of a bus current in real time through a current transformer; and when the current exceeds a safety threshold value, the electronic switch is switched on to shunt the current of the food processing chamber. By adoption of the breakdown arc-extinction circuit, spark discharge caused by air bubble breakdown in the sterilizing process in the high-voltage pulse electric field can be effectively eliminated, and electric arc is avoided to cause short circuit or damage to an apparatus, thereby prolonging the service life of the high-voltage pulse generator and the food processing chamber and improving the safety performance of the high-voltage pulse generator and the food processing chamber.