A high-voltage vacuum breaker is used for operation or exit of an electrical apparatus in an electrical power system; the high-voltage vacuum breaker comprises a control panel, a control chamber, an arc-estinguishing chamber, an entrance insulative bushing, a digital relay, an electronic current mutual inductor, an outlet insulative bushing,; the electronic current mutual inductor is provided in the entrance or the outlet insulative bushing and connected with the digital relay; the digital relay is composed of a filtering and amplitude adjusting module, an A / D converting module, a CPU processing module, a liquid crystal display module, and a switch quantity input and output module, and is connected with an operation mechanism of the breaker by the switch quantity input and output module. Compared the invention with a current technic, the volume is not increased, measurement, protection and diagnoses functions in an electrical power line are organically integrated, added functions perform real-time on-line monitoring on a work state, a loop control state, and a coil opening / closing state of the breaker, thereby realizing intelligentized independent operation of the breaker.