Through content analysis of Discovery Education, we found that the content of national identity is abundantly embodied in the curriculum of primary schools in UK. As a widely used online platform in primary schools of UK, Discovery Education integrates the content of national identity education into the curriculum. The presentation meets the needs of primary school students for its psychological and behavioral characteristics and provides personalized learning opportunities through a variety of links. Such practice displays advantages of online education. Recommendations are offered to developing virtual learning community, data analysis of online teaching process and the construction of expression system of online national identity education.