The invention discloses an evaluation method and system specific to simulation performance indexes of a power communication network. The method comprises the following steps: mapping nodes carrying performance index data in a power communication simulation node network into virtual nodes in one-to-one correspondence according to preset rules; forming one class cluster by one or multiple virtual nodes; generating similarities between every two class clusters, and performing clustering processing on multiple class clusters according to the similarities; obtaining a corresponding typical node ofeach class cluster according to the preset rules; and evaluating multiple groups of typical nodes, and obtaining an evaluation result on the performance indexes in the power communication simulation node network. The method and system which are disclosed by the invention obtain the multiple virtual nodes by performing normalization processing on statistical index data of each layer in a simulationnetwork of the power communication network; and the clustering processing is performed on the virtual nodes, and the obtained typical nodes in the class clusters are used for replacing the original data, thus volume of to-be-processed data is greatly reduced and then processing efficiency is greatly improved.