The invention discloses a method for obtaining the temperature of a cable connector core. The method comprises the following steps: A, acquiring ambient temperature data and obtaining the surface temperature data of a cable body by using a temperature sensor array; B, Calculating the cable core temperature of the cable body according to the above data; C, inputting the cable core temperature of the cable body into an axial temperature distribution model to obtain the internal cable core temperature of the cable connector. The method calculates the cable core temperature of the cable body by obtaining the ambient temperature and the surface temperature data of the cable body, and then obtains the internal cable core temperature of the cable connector according to the axial temperature distribution model.