The utility model discloses a drive power supply of repulsion mechanism, including battery charging unit, discharge cell, battery charging unit includes the step up transformer who takes a percentage in solid state relay, voltage regulator, area, first charging resistor, second charging resistor, single -pole double -throw, high voltage charging subelement, flexibly charge subelement and the combined floodgate subelement that charges, the discharge cell include the high -pressure discharge subelement, flexibly discharge the subelement, subelement, discharge resistance, first contactor, second contactor and the third contactor of discharging closes a floodgate. The utility model discloses an increase a set of motor -driven charge -discharge subelement, can make drive power supply satisfy different demands in a flexible way under the operating mode of difference. On the basis of satisfying the divide -shut brake demand that traditional direct current breaker is simple, added high -speed separating brake, low -speed separating brake function, can enough satisfy the speed demand of the high -speed separating brake of quick repulsion mechanism, can prolong its life again on satisfying ordinary repulsion mechanism separating brake basis, added reclosing the function, can satisfy higher demand.