Tax preferential document feature extraction method and device, electronic equipment and storage medium

The invention provides a tax discount document feature extraction method and device, electronic equipment and a storage medium, and relates to the field of tax information process.The method comprises the steps that a tax discount document is obtained and segmented, and an initial term text is obtained; utilizing a first neural network model to extract a tax discount clause text in the initial clause text; utilizing a preset feature extraction regular expression and/or a second neural network model to extract feature information of different preset feature types in the tax revenue discount text; storing the feature information to a database according to a preset feature type; a regular expression and a neural network model can be adopted to extract feature information in the tax discount document, the regular expression can extract feature information with obvious structural features, and the neural network model can extract feature information with discrete structures and without obvious rules. Therefore, th