Signal processing method in large-plane magnetic measurement system

The invention relates to a signal processing method in a large-plane magnetic measurement system, and the method comprises the steps: carrying out the preprocessing of an obtained magnetic signal, inputting the preprocessed magnetic signal into a multi-stage error model, and carrying out the multi-stage error compensation processing, and obtaining the magnetic data needed by the system. According to the method, signal processing of magnetic data in the magnetic measurement system is specifically realized, including signal acquisition, frequency band filtering, linearity compensation, orthogonality compensation, vector axis alignment compensation, gradient error compensation and the like, and interference factors such as frequency band interference, linearity interference, orthogonality interference, vector axis alignment error, gradient error and the like are eliminated; the whole flow of acquisition, processing, compensation, display and storage required by magnetic measurement of the system is realized, so