Line control method, circuit breaker and power equipment

The embodiment of the invention provides a line control method, a circuit breaker and power equipment, and relates to the field of electronics. Mistaken closing operation in an abnormal current state can be avoided. The circuit breaker comprises a breaking module, a conduction module, a monitoring module and a data transmission module, wherein the breaking module is used for breaking electrical connection between the circuit breaker and a downstream line under an over-current or short-circuit condition; the conduction module is used for conducting the circuit breaker and an upstream line after the circuit breaker is disconnected from the downstream line, so that the circuit breaker and the upstream line form a current loop; the monitoring module is used for monitoring the magnitude of current in the current loop; and the data transmission module is connected with the monitoring module, and is used for transmitting the magnitude of the current in the current loop to terminal equipment, so that the terminal equ