Abnormal invoicing identification method and system, electronic equipment and medium

The embodiment of the invention discloses an abnormal invoicing identification method and system, electronic equipment and a medium. The abnormal invoicing identification method comprises the following steps: acquiring current invoicing data of a user; performing feature extraction on the current invoicing data to obtain features corresponding to the current invoicing data; and based on a pre-accessed abnormal invoicing detection model, obtaining a model response of the abnormal invoicing detection model to the characteristics of the current invoicing data, the model response being an abnormal detection result corresponding to the current invoicing data, and the abnormal detection result being used for limiting an invoicing operation of a user based on the invoicing system according to the abnormal detection result. According to the embodiment of the invention, the accuracy and efficiency of invoice abnormity identification are improved. 本说明书实施例公开了一种异常开票识别方法、系统、电子设备及介质。其中，异常开票识别方法包括获取用户的当前开票数据；对当前开票数据进行特征提取，得