Information synchronization method and load balancing system

The embodiment of the invention relates to the technical field of network communication and discloses an information synchronization method and a load balancing system. The information synchronizationmethod comprises the following steps of when receiving a first multicast message which is sent by second load balancing equipment and represents that total synchronization needs to be carried out, sending a first unicast message which represents that information synchronization is agreed to be carried out to the second load balancing equipment; when a second unicast message which is sent by a second load balancing device and is used for session synchronization is received, the session information of a connection session established by the first load balancing device being added into a third unicast message; and sending the third unicast message to the second load balancing device, so the second load balancing device creates a corresponding connection session according to the session information in the third unica