Abstract: This paper performed the test verification by electrostatic spraying fluorescent penetrant inspection for the complex structure of hollow-cored parts, such as porous hollow-cored blade, and achieved the satisfactory inspection result. The method can effectively prevent the penetrant entering hollow-cored passages and causing severe bleed-out problems during examination, and avoids the shortcoming, such as difficult to examination, slowly check speed and poor inspection background, as the penetrant is applied by conventional dipping or brushing. Testing results showed the method could raise inspection efficiency and provide reliable inspection result for the porous hollow-cored structure part, and has a wide application prospect in this field.