This paper uses the temperature monitoring technology on intelligent composite electric cable to monitor the temperature of the electric cable in real time based on weak fiber Bragg grating (wFBG) array.Through two optical fibers in parallel connection,the monitoring o f the internal and external temperatures of the electric cable can be realized a nd the influence of stress during temperature measurement can be avoided.The temperatur e signal is obtained by detecting wFBG wavelength drift to achieve high accuracy and high spatial resolution temperature measurement.The system is experimentally studied using the wFBG arra y.The results show that the system can achieve high accuracy,high sensitiv ity and high spatial resolution distributed measurement of the internal and external temperatures of the electric cable,and its spatial resolution is up to 10cm,the measurement accuracy is 0.1℃.Th e temperature monitoring system of intelligent composite electric cable based on wFBG array ca n meet the actual needs of smart grid operation.