The disclosure discloses a method and system for enhancing the security of a user security model. In the solution of the disclosure, after a Simple Network Managing Protocol (SNMP) server acquires a multi-byte original password of a user, detects whether the original password is composed of a specific byte string repeated multiple times; and if so, the user is prompted to reconfigure a password. In accordance with the solution provided by the disclosure, the disclosure greatly enhances the security of version V3 for the SNMP server side, solves the problem that the vulnerability exists in the security defined in version V3 in the prior art, and avoids the security hidden danger caused by the fact that illegal users can use the password different from the password of the authorized user to log on the SNMP server.