Abstract: The pulse eddy current non-destructive testing technology is an important non-destructive testing technology. Based on the analysis of the technology's physical process, a theoretical model is established. Combined with an electromagnetic theoretical analysis, a two-dimensional axisymmetric finite element theoretical model is built for detecting the object defects, with consideration of the skin effect. The electromagnetic response is simulated under different exciting frequencies, based on a theoretical analysis of the 3A21 alumal's crack defect. The pulse eddy non-destructive testing experiments are carried out on a homemade physical experimental platform. Experimental results are found to be consistent with the theoretical prediction with respect to the relative position and the size of the defects. The method is shown to be effective in detecting the aviation component's defects, with various applications and development prospects.