The invention belongs to the technical field of high-voltage power supply control and particularly relates to a method and a device for electrically controlling a high voltage circuit breaker to switch on or switch off. According to the technical scheme, the high-voltage circuit breaker is controlled by a contact signal of a control system to switch on or switch off, i.e., the control system drives to lead the circuit breaker to switch on, and the control system stops driving to lead the circuit breaker to switch off, particularly, the control system is not directly drive the coil of the circuit breaker for switching on or switching off, but control an intermediate relay, an on-delay relay and an off-delay relay, the three relays act to generate a switching-on short-time pulse signal and a switching-off short-time pulse signal with the time being adjustable from 1 to 60 seconds, thus ensuring that a distributed control system (DCS) can be switched off by the high-voltage circuit breaker in a failure and preventing the coil for switching on or switching off from being burnt up after being live for a long time. The invention has the characteristics of operation reliability, potential risk elimination and high operability and skillfully combines the advantages and overcomes the disadvantages in the prior art, thus ensuring that the DCS can be switched off by the high-voltage circuit breaker in the failure and preventing the coil for switching on or switching off from being burnt up after being live for a long time.