The invention discloses a resource quantitative distribution method based on an optical network architecture service plane, which comprises the steps of reducing physical topology nodes into abstract network topology with only boundary nodes being left in physical network topology; enabling links of different target-source node pairs in the abstract network topology to share the same practical link, wherein different practical links can be selected to carry out data transmission of the links of the target-source node pairs, and the data flow of each practical link can be only along the same direction; calculating a bandwidth value of a shortest path between each internal node and all of the boundary nodes in the physical topology, and merging the internal node to the boundary node corresponding to a maximum value of the bandwidth value. According to the invention, linear constraint conditions are defined, bandwidth resources of all links are sufficiently considered, thereby not only being high in resource request hit ratio, but also fully integrating scattered bandwidth resources, and enabling the utilization ratio of the resources to be improved correspondingly.