Guo Zhonghua pointed out in the 5th issue of Journal of Nanjing University (Philosophy, Humanities and Social Sciences) in 2020 that conceptual semantics is the condensation of the spirit of the times, and we can see the spirit of the times by analyzing the core concepts of the times. The term "comrade" is the core member of the family of Chinese political concepts in the 20th century. The term "comrade" is the cornerstone of the concept of "Comrade politics", which reflects the basic strategy of the Communist Party of China in leading the political revolution and national construction to a certain extent. The meaning of "comrade" in the movie Song of Youth indicates the revolutionary strategy of "Comrade politics" established by the Communist Party of China, which takes class distinction, revolutionary struggle, collectivism and communism as the core elements. The semantic analysis of "comrades" shows that adhering to the democratic and equal relationship and appellation of comrades within the party is the magic weapon for the party organization to maintain its advanced ideal and fighting spirit.