A power supply control device for a communication network, the device comprising: a reverse power supply module , which is configured to detect a power supply state of a reverse power supply terminal, and transmit reverse power supply state information to a power supply control module , wherein the reverse power supply terminal is used to supply power through reverse power feed, RPF; a local power supply module , which is configured to detect a power supply state of a local power supply terminal, and transmit local power supply state information to the power supply control module , wherein the local power supply terminal is used to supply power through a local power source; a bus bar control module , which is connected to a power supply output terminal of the reverse power supply module and a power supply output terminal of the local power supply module , and is configured to detect power supply output information of the reverse power supply module and the local power supply module , transmit the power supply output information to the power supply control module , and converge outputs of the reverse power supply module and the local power supply module to form a power supply bus bar for powering a lower-level power load; the power supply control module , which is configured to output, according to the power supply output information received from the bus bar control module , the reverse power supply state information and the local power supply state information, a control signal to the reverse power supply module and a control signal to the local power supply module , so as to adjust a magnitude of a power supply output of the reverse power supply module , a magnitude of a power supply output of the local power supply module and a ratio between the power supply output of the reverse power supply module and the power supply output of the local power supply module . a reverse power supply module , which is configured to detect a power supply state of a reverse power supply terminal, and transmit reverse power supply state information to a power supply control module , wherein the reverse power supply terminal is used to supply power through reverse power feed, RPF; a local power supply module , which is configured to detect a power supply state of a local power supply terminal, and transmit local power supply state information to the power supply control module , wherein the local power supply terminal is used to supply power through a local power source; a bus bar control module , which is connected to a power supply output terminal of the reverse power supply module and a power supply output terminal of the local power supply module , and is configured to detect power supply output information of the reverse power supply module and the local power supply module , transmit the power supply output information to the power supply control module , and converge outputs of the reverse power supply module and the local power supply module to form a power supply bus bar for powering a lower-level power load; the power supply control module , which is configured to output, according to the power supply output information received from the bus bar control module , the reverse power supply state information and the local power supply state information, a control signal to the reverse power supply module and a control signal to the local power supply module , so as to adjust a magnitude of a power supply output of the reverse power supply module , a magnitude of a power supply output of the local power supply module and a ratio between the power supply output of the reverse power supply module and the power supply output of the local power supply module . <EOS>