To study the network structure and related properties of shipping network, this paper researches the community structure of shipping network. The Newman fast algorithm based on modularity is constructed. And "The twenty-first Century Maritime Silk Road" shipping network is chosen as the case, which is unweighted and undirected shipping network, and composed of 453 ports and 3 444 edges. From the perspective of shipping network connectivity, the Newman fast algorithm is used to calculate "The twenty-first Century Maritime Silk Road" shipping network. The structural properties of this shipping network can be obtained. There is only one core community in this shipping network, which is leader community, and consists of 173 ports. The degree follows the power-law distribution. Other communities are non-core communities. The "The twenty-first Century Maritime Silk Road" container shipping network owns huge community structure with the core nodes.