Eddy current nondestructive testing device

The invention provides an eddy current nondestructive testing device which comprises a central module, a digital-to-analog conversion module, a power amplification module, a magnet exciting coil, an acquisition module, a pre-amplification module, an analog-to-digital conversion module and a display module, and the digital-to-analog conversion module is connected to the output end of the central module; the power amplification module is connected to the output end of the digital-to-analog conversion module; the excitation coil is connected to the output end of the power amplification module, generates an excitation signal and performs excitation disturbance on an object to be detected; the acquisition module is used for acquiring the induction signal; the pre-amplification module is connected to the output end of the acquisition module; the analog-to-digital conversion module is connected to the output end of the pre-amplification module and is used for carrying out operation processing on the digital excitati