Risk early warning method for two-dimensional code

The invention discloses a risk early warning method for a two-dimensional code. The risk early warning method is characterized by the steps of firstly, generating a traceability code; secondly, generating a prefix code; thirdly, generating a Y-bit verification code; and fourthly storing the traceability code, the prefix code and the Y-bit verification code in an anti-counterfeit database, combining the traceability code and the prefix code, then generating an initial two-dimensional code by using a barcode generator, and embedding the Y-bit verification code in the middle position of the initial two-dimensional code to form a two-dimensional code. The method of the invention can rapidly and steadily generate a large number of two-dimensional codes which is high in anti-counterfeiting and difficult to counterfeit, so as to effectively ensure the uniqueness of the two-dimensional codes and prevent the duplicated or repeated use. 本发明公开了种二维码的风险预警方法，其特征是按如下步骤进行：1、生成溯源码；2、生成前缀码；3生成Y位验证码；4将溯源码、前缀码和Y位验证码存入防伪数据库中，并将溯源