Abstract: Ultrasonic phased array technology has been gradually applied in NDT of nuclear power plant turbine blade root. In order to optimize the inspection process and aid ultrasonic signal analysis, CIVA software was used for the simulation of phased array inspection of turbine blade root. The results show that the CIVA software can accurately and effectively provide the inspection process design and data analysis for phased array inspection of blade root, and it shall have valuable application prospect.