Circuit breaker

The invention relates to the technical field of circuit breakers, and discloses a circuit breaker, which comprises a driven mechanism, a repulsive force mechanism and a first power connection mechanism, and is internally provided with a side surface vertical tank body fixedly mounted on the side surface of a bottom vertical tank body and a first metal rod located in the central area of the side surface vertical tank body and longitudinally moving along with a telescopic rod. The circuit breaker can control the specific condition of a circuit switch according to the total medium compression strength continuously generated by a water pump or an air compression motor connected with the circuit breaker, once the strength of a compression medium formed by an output motor reaches a target, the circuit breaker can automatically disconnect the circuit, in addition, the circuit breaker can adjust the control range according to actual requirements, and the control range is wide. Therefore, the application range of equi