The Theory of State Translation Program is an epoch-making translation theory pioneered by Chinese scholars. National discourse translation, as a self-interested national event, involves multiple national concerns. The powerful cognitive function of metaphor makes it a commonly employed method and a focus in national discourse translation. Meanwhile, the rich associative meanings of metaphor pose challenges in its translation. Taking the Resolution of the Central Committee of the Communist Party of China on the Major Achievements and Historical Experience of the Party over the Past Century (abbreviated as the “Resolution”) as a sample, the exploration of metaphor translation in national discourse, guided by the Theory of State Translation Program, contributes to the construction of national translation competence.