Abstract：Critical discourse analysis ( CDA) regards language as a social practice, a reflection of the power relationship between text producer and receiver. It provides a new perspective for the discourse analysis by revealing the unequal relationship that is naturalized in the text, shedding light on social linguistics and discourse analysis. Using the news of Shenzhou 5——China's first successful launch of manned spaceship as the subject of study, this paper gives a critical discourse analysis on the ideologyembedded news in Fairclough's three-dimensional framework. It adopts Halliday's systemic-functional grammar as the tool to describe text of the news, and then turns to social background to explain the production of the news text and the correlation between social factors and language features. From this essay, it's easy to reach the conclusion that the relationship between language and ideology is dialectic: the use of language reflects ideology on the one hand and acts upon ideology on the other hand.

Keyword：news discourse;systemic-functional grammar;ideology;three-dimensional framework;