Abstract: While using pulsed eddy current testing technology to detect the wall thickness of ferromagnetic pressure equipment, the difference between the pulsed excitation parameters and the excitation coil parameters will greatly affect the test results.Firstly, a simulation model of pulsed eddy current test for ferromagnetic specimen thickness is established by finite element method.Then, the influence of pulse excitation parameters and excitation coil parameters on the detection sensitivity and resolution is analyzed by taking the differential signal peak as the characteristic.According to the influence law, the pulse excitation parameters and excitation coil parameters are determined, the range of effective wall thickness detection under this parameter is determined by simulation experiment.Finally, the correctness of the simulation results is verified by the test results.