The invention provides a time frequency synchronization fusion network architecture, which comprises backbone network first-stage and second-stage time frequency synchronization nodes, a backbone network timing link, inter-provincial transmission networks, provincial transmission networks, prefecture and county transmission networks, intra-provincial network first-stage and second-stage time-frequency synchronization nodes and an intra-provincial network timing link, wherein all of the inter-provincial transmission networks realize the one-way connection through the backbone network timing link and the backbone network first-stage time frequency synchronization nodes or the backbone network second-stage time frequency synchronization nodes; the provincial transmission networks realize one-way connection through the intra-provincial network timing link and the intra-provincial network first-stage time-frequency synchronization nodes; the provincial transmission networks and the prefecture and county transmission networks realize one-way connection through the intra-provincial network timing link and the intra-provincial network first-stage time-frequency synchronization nodes or the intra-provincial second-stage time-frequency synchronization nodes; the prefecture and county transmission networks realize one-way connection through the intra-provincial network timing link and the intra-provincial network second-stage time-frequency synchronization nodes; the inter-provincial transmission networks are connected with the provincial transmission networks through the backbone network timing link, at least two intra-provincial network first-stage time-frequency synchronization nodes and the intra-provincial network timing link.