Abstract: Political news is a subject that discourse analysts always pay attention to.A great many studies have been done on this subject，from quantitative analysis to qualitative analysis，from wording，sentence structure to discourse function and interpersonal meaning.Most studies are done by means of critical discourse analysis，in which functionalsystemic grammar analytic tools of mood，transitivity，transformation，etc are used to expose ideology and hegemony.However，Metaanalysis of language features can not reveal emotions，attitudes and judgment behind the speeches.Martin′s evaluation theory offers a new attempt.Based on his evaluation theoretical system，using President Hu Jintao′s visit to U.S.from January 18th to 20th，2011 as background and the online reports of AngloAmerican mainstream news media as corpus，this paper is trying to dig out political purposes，intentions or standpoints from the speakers′ emotions，attitudes and judgments，which is significant for the development of CDA from the analysis of vocabulary and sentence level to a small chapter and the social dimension.

Key words: political news, AngloAmerican mainstream news media, evaluative discourse analysis, metafunction analysis, theory of functionalsystemic grammar, President Hu Jintao′s visit to the U.S., Martin