The utility model provides a generator carbon brush current distribution monitoring system mainly is applied to environment such as large hydropower station, thermoelectricity, water -storage power station. The utility model provides a generator carbon brush current distribution monitoring system, including direct current sensor, signal acquisition transmission case and host computer triplex, the direct current sensor adopts high accuracy current sensor, transmits the direct current collection transform back of every carbon brush for signal acquisition transmission case, signal acquisition transmission case converts the received current signal data signal into and transmits through the post -filter that goes to make an uproar gives the host computer, carries out data processing by the host computer and judges, the whole system is supplied power by 220V. Generator carbon brush current distribution monitoring system can carry out accuracy collection to the direct current signal under the strong jamming environment to through wireless transmission module, hold data transmission for telemonitoring. The whole system adopts integrated integrated design to in arranging the shielded cell in, guarantee the job stabilization nature of each component.