Based on the analysis of pulsed remote field eddy current principle,this article applied the pulsed remote field eddy current technology in the detection of nonmagnetic aviation metal plate components with using U-type component,simulated and designed hollow model,assembled magnetic model, connected magnetic circuit model,compared the distance of the three models' transition zone,the defects detection sensitivity, and the detection capability of the three models for different thickness plates.The simulation results show that, with connected magnetic circuit of the sensor model can not only narrow the distance between the excitation and detection coil from 20 mm to 10 mm,but also can improve the sensitivity of defects detection,while it has a stronger detection capability for more than 11 mm thickness plates.