The invention relates to a method of calculating optical network multi-restriction shortest service route, including the steps and contents as follows: firstly setting up a logic port route list in network cell; then according to the terms in the route list, deriving topology charts; finally applying Dijkstra to search the shortest path in each chart, comparing the results and taking the shortestas the final solution; it is applied to the shortest route calculation and cross linking allocation of TDM end-to-end service in optical network management.