Abstract: Ideology has been the focus of politics and sociology. The research into the ideology in political metaphor has been done on the basis of corpus of the speeches of top leaders of both China and the US in six top universities of both countries. Data in the paper show that over 21 categories of metaphors are employed in these speeches, thus indicating the richness and diversity of political metaphor. Generally speaking, metaphors are more commonly used in Chinese. Also specific analysis, comparison and contrast have also been made concerning the top five metaphors as well as the unique metaphors in both Chinese and the US leaders' speeches. The research shows that conceptual metaphors in political discourse are characterized by culture and conventionality. Meanwhile the frequency of metaphor using by leaders of both sides is counted and analyzed in detail. Regarding the relationship between conceptual metaphors and ideologies, this study indicates that the former have a function of constructing the latter while the latter restrict the formation and application of the former.