Method and device for supporting terminal roaming and storage medium

The invention relates to a method and device for supporting terminal roaming and a storage medium, and the method comprises the steps: obtaining a first instruction, and starting a secondary authentication-free function according to the first instruction; acquiring a flow message sent by the terminal after switching the wireless access point or the roaming network, and determining user mac information and an incoming interface corresponding to the received flow message according to the flow message; and judging whether the terminal is authenticated to be online or not according to the user mac information and the incoming interface, if the terminal is authenticated to be online, releasing the flow message, and adding a new IP address formed after the terminal switches the wireless access point into the authenticated user table. The method is applied to internet behavior management equipment, when the equipment is connected with a plurality of APs, the same terminal can surf the internet through the same AP, a