Abstract: Aiming at the problems of low positioning accuracy and poor anti-interference ability of the existing four-axis translational scanning imaging system for detecting aeronautical rotors, a five-axis ultrasonic imaging detection system was developed. The system optimizes the design of the detection workbench, the probe clamping device and the anti-interference device, improves the filtering method, and adds the probe alignment algorithm into the software. The system is used for anti-interference testing, and the positioning accuracy of the system is verified.The experimental results show that the five-axis ultrasonic imaging detection system has high positioning accuracy, good imaging effect, can effectively suppress electromagnetic interference, and realize the continuous and stable detection of the rotor.