The invention discloses a conductive loop of a circuit breaker. The conductive loop comprises a first contact group and a second contact group, wherein the first contact group comprises a first fixed contact and a first moving contact; the first fixed contact is connected to a wire inlet terminal; the second contact group comprises a second fixed contact and a second moving contact; the first moving contact is in conductive connection with the second moving contact; the second fixed contact is connected to a release; and the release is connected with a wire outlet terminal. By the conductive loop of the circuit breaker, a plurality of moving contacts are in conductive connection and are coaxially arranged; the fixed contacts stride across the moving contacts and are connected with the wire outlet terminal under the condition of ensuring insulation; the wire inlet terminal and the wire outlet terminal can be distributed at two sides under the premise of ensuring that the circuit breaker is compact in overall structure and small in occupied space; and wiring of the circuit breaker and the other electrical equipment is facilitated.