The utility model discloses a vacuum air pressure formula anti -electric arc high voltage circuit breaker, casing including having the cavity is equipped with vacuum hole and inlet port on the wall, the piston, can be under vacuum pump gentleness pumping action in the casing reciprocating motion and closed cavity's one end, and two poles, one of them root is adorned admittedly on the piston, and wiring end clearance fit is in first pole hole of casing one end and outside the outstanding casing, and another root is adorned admittedly on the casing, and the wiring distal process goes out outside the casing, and the tip of one of them pole has elastic joining section, and the pole of installing on the piston can contact or separate along with piston reciprocating motion and with the tip of another pole. Its technical scheme can prevent effectively that two piece interior poles of high voltage circuit breaker from producing electric arc when meeting the company of electric shock to effectively block the electric arc owing to the production of opening circuit, realize safe break -make high -voltage circuit's effect.