The invention discloses a breaking spring compression device, which comprises a support seat, a drive mechanism and a locking structure, wherein the support seat is provided with a limiting structure for moving towards one side, far away from a breaking spring, of a spring seat in a breaking spring assembly; the drive mechanism comprises a drive part and a transmission part; the transmission part moves towards the direction of the spring seat under the action of the drive part and compresses the breaking spring; a perforating hole through which a pull rod of the breaking spring assembly passes is formed in the transmission part; and the locking structure is used for keeping the breaking spring in a compressed state after the breaking spring is compressed in place. Through the compression device disclosed by the invention, the breaking spring can be conveniently pre-compressed, so that subsequent installation of the breaking spring assembly on a breaker is facilitated.