Abstract: To investigate the influence of braiding parameters on cable shielding performance and validate the accuracy of theoretical models, the calculation theories for the transfer impedance of braided shielded cables were systematically reviewed, with emphasis on the influence of key parameters such as braiding angle, number of carriers, and wire diameter. Electromagnetic field simulation technology was employed to construct the cable model, and the transfer impedance was simulated. Finally, the shielding effectiveness of physical cables was tested using the absorbing clamp method. Results showed that the analytical calculations agreed well with simulation results below 10 MHz, while deviations occurred at higher frequencies due to model simplifications. The CST simulations demonstrated good agreement with measured data at higher frequencies, validating the simulation effectiveness. This study provides a theoretical basis and practical reference for the optimized design of braided shielded cables.