The invention relates to a method and a device for solving dual-computer cluster split brain, belonging to the technical field of mass data storage. According to the method, one or more storage pools are created through a rear-end shared disk, the same storage pool can be assigned to a certain node according to user selection, a quorum disk for storing exchange information is created for each node in the storage pool, and the exchange information comprises a quorum superblock for identifying clusters and position and length of related information, a quorum information for identifying resource competing result and a response information for identifying that other nodes give up competition for the resource; when split brain happens, the node obtaining the resource writes quorum information into the quorum disk, which indicates that the resource of the node of the quorum disk is obtained by the node obtaining the resource; and the node obtaining no resource writes the response information into the quorum disk, which indicates that the node obtaining no resource knows that the resource of the node of the quorum disk is taken over by other node, and itself is going to give up competition for the resource. As compared with the prior art, by application of the method and the device provided by the invention, occurrence of split brain is avoided successfully.