Realizing method for controlling switch-in

The present invention discloses an implement method for controlling access. Said method includes the following steps: network side down-sends the access levellimitation information containing different domain to user terminal; before the information received by user is accessed into network, according to self-body stored user level information and network down-sent access level limitation information the user terminal can judge that the domain to be accessed is limited or not, if it is limited, said information is not accessed, otherwise, it can be accessed into network, and can make communication with network side.