A method and a device for selecting an aggregation node are provided. The method includes: acquiring a trust value list for each of nodes in a cluster, the trust value list for each of the nodes including trust values for each of the nodes, acquired by remaining nodes in the cluster; acquiring an actual trust value for each of the nodes according to the trust value list for each of the nodes; calculating an actual remaining energy ratio of each node according to a self-calculated remaining energy ratio of the node calculated by itself and other-calculated remaining energy ratios for the node calculated by the remaining nodes in the cluster; calculating an energy-trust integrated value for each of the nodes according to the actual trust value and the actual remaining energy ratio; and selecting an aggregation node according to the energy-trust integrated values for the nodes.