Feature processing method based on tax-related risk of customs declaration of import and export express service

The invention provides an import and export express business customs declaration tax-related risk-based feature processing method, which comprises the steps of dividing customs data into basic features and expert features, enabling the basic features to comprise figure portrayal data and customs declaration data, enabling the expert features to comprise business combination features, and performing dimension raising on the features, a high-dimensional spatial feature is obtained; according to the characteristics of the high-dimensional spatial features, carrying out dimension reduction on the high-dimensional spatial features to obtain processed features; the processed features are input into the pre-judgment model for test verification, the feature dimensions are subjected to dimension increasing and reducing processing through the method provided by the invention, and then the feature dimensions are input into the pre-judgment model for judgment, so that the recall rate and the accuracy rate of tax-related