The material and structure of aluminum conductor with carbon fiber composite core(ACCC) are different from those of common aluminum cable steel reinforced(ACSR). ACCC has obvious advantages in stress, sag characters, transmission capacity, and energy loss etc. Some typical data are extracted from more than 10,000 data for sag calculation of conductor stress under various design conditions, for analyzing the application of ACCC in new transmission lines and capacity expansion transformation. As a result, the applicability and economy of ACCC is illustrated.