The present invention provides an electric power communication network cache optimization method facing content. The method comprises: employing a central controller to obtain bandwidth information and capacity and position information of content and cache nodes; according to the content and cache node information, generating request decision vectors and position decision vectors, and creating a bipartite graph for each file; and aiming at each server node, constructing a bipartite graph according to an actual situation, after constructing one bipartite graph for each file, performing processing according to the time efficiency descending order, completing the bipartite graph maximum weight matching under the restriction of node capacity and flow cost, and completing distribution. The algorithm is operated at the central controller of the electric power communication network and takes the minimization of total transmission time delay in a power grid special network domain as a target on the premise of obeying the restriction of disc space and access line capacity of distributed cache nodes to execute cache deployment decision. Through execution of the algorithm, the scheduling is reasonably and rapidly performed to optimize the storage position and allow subscribers to access the nearest cache nodes so as to reduce the transmission time delay.