The utility model discloses an electric power communication system especially relates to a power communication integrated data network holds system in place with a net. A power communication integrated data network holds system in place with a net which the structure as follows: the junction center host computer is connected with the reserve machine of junction center, junction center host sends interface and each communication station's first receipts interface connection, and interface connection is received to each communication station's first transmission interface and junction center host computer, and each communication station's second receiving interface and the reserve machine of junction center send interface connection, and each communication station's second sends interface and the reserve machine receipt interface connection of junction center. The utility model discloses can be effectual two layers of equipment of assembling of solution communications network activestandby that optic fibre list expert led to the fact when carrying out two first line of a couplet with different PE equipment respectively switch over the inefficacy problem to guarantee powerline network's safety and stability, guaranteed communication data net bearer service's error -free transmission, be favorable to the strong electric wire netting of framework, improved information -based, digital, automatic, the interdynamic level of manageing.