The invention provides a three-phase three-wire intelligent circuit breaker, comprising a miniature circuit breaker and a miniature electric meter. The miniature electric meter is attached to the miniature circuit breaker. The miniature electric meter comprises an electricity obtaining plug and a metering unit. The electricity obtaining plug is inserted on the miniature circuit breaker and obtainselectricity from the miniature circuit breaker. The electricity obtaining plug and the metering unit are in plug connection, so connection is relatively reliable and mounting, dismounting and maintenance are convenient. Three current transformers are built in the metering unit. Centers of the current transformers and the center of a wiring terminal of the miniature circuit breaker are overlappedand are used for measuring three-phase currents. The metering unit collects the three-phase currents and three-phase voltages in a virtual ground to real ground mode, so phase loss condition is avoided. The current transformers are the current transformers with small sizes. Through adoption of a built-in structure, an appearance is relatively beautiful and tidy. The current transformers are relatively safe and are not liable to damage. The service life of the intelligent circuit breaker can be prolonged.