The invention relates to an information security technology. In order to solve the problem that the existing user security access method is not enough in security, the invention provides a user security access method. The technical scheme of the method can be summarized by the following steps: firstly, starting an access device, and initializing a terminal blacklist and an access information table; after that, using the access device to issue a PING access strategy and closing PING response, and then enabling a user terminal to visit the access device according to the PING access strategy; using the access device to judge whether the IP of the user terminal is included in the blacklist or not; if yes, enabling the access device to reject the visit of the user terminal; if not, using the access device to judge whether an access sequence of the user terminal is consistent with a sequence of the PING access strategy of the access device or not and judge whether the access behavior of the user terminal needs to be recorded on the backlist or not; if yes, enabling the access device to respond to the PING of the user terminal; if not, recording the user terminal on the blacklist. The user security access method has the beneficial effect of improving the security, thus being suitable for user security access.