Abstract: This paper addresses the problem of the present vacuum thermal test network architecture with low data link reliability and long time recovery between the active and the standby data links. A new method is proposed to build the network, with the network core layer using the virtual switching system(VSS), the distribution layer equipment having the stackable feature and the core layer equipment being interconnected by the multi-ethernet channel(MEC). The link aggregation control protocol(LACP) is used between the distribution layer equipment and the access layer equipment. This new architecture is tested in the key equipment and the data link redundancy, and the failure recovery time is zero between the active and standby equipments or the active and standby data links. This architecture is deployed and enjoys a good run in practical projects.