In order to solve the problem that cracked-shield of aircraft cable will affect its shielding performance, the transfer impedance of thin-walled tubular shield and braided shield is studied. The low-frequency parallel equivalent model is proposed, and the transfer impedance mathematical model of cracked-shield is deduced by using the electromagnetic coupling theory according to different shielding structures. The three-dimensional geometric model of cracked-shield is analyzed in ANSYS HFSS based on finite element method. The numerical examples are used to compare the simulation results and theoretical calculation results of the transfer impedance of cracked-shield, and the change law of transfer impedance affected by different cracked-factors is analyzed. The results show that the transfer impedance of cracked-shield is related to structure, frequency and cracked-radius of the shield, which has a certain value in engineering application.