The utility model discloses an electrical power generating system for power communication, this system be including integration battery of electric power group, rectifier, DCDC direct -current converter and control unit, and wherein DCDC direct -current converter includes a plurality of DCDC module and a lithium iron phosphate battery storage battery, and the output of lithium iron phosphate battery storage battery and DCDC module connects. Through this system, when communication return circuit emergence short circuit was perhaps transshipped, lithium iron phosphate battery storage battery provided an electric current that is arranged in trouble return circuit communication equipment's air switch dropout, disengagement failure source the short time, when take place to exchange losing the electricity in the transformer substation, integration battery of electric power group discharges earlier, and after integration battery of electric power organized the electric quantity and gives out light, lithium iron phosphate battery storage battery beginning emergency service provided 48V dc supply for communication equipment. The utility model discloses the communication equipment outage problem of other branch roads that can solve in the integrated power branch road short circuit of 48V direct current output and overload and cause, the multiplicable communication load battery reserve time.