Abstract: Turbine blades are the main turbine components, the integrity of whose roots are related to the safe and stable operation of the unit. In order to test the integrity of the T-shaped leaves roots, stress analysis of the T-shaped leaves roots was performed by the finite-element computing software to define the location of the stress concentration and the ultrasound examination. The ultrasonic testing method on the T-shaped Root of Turbine Blade was put forward with law detection principle of ultrasonic, and through the self-designed micro longitudinal wave angle probe been self-designed, the experimental analysis was carried out. It was concluded that the ultrasonic testing method of the T-shaped Root of Turbine Blade by longitudinal ware was ideal.