Culture is a social phenomenon,but it is also a historical phenomenon.Creating a product of the long-form.Due to the different living conditions,values,social customs,religion,history,development,all ethnic groups formed their own cultural norms,it is the cultural differences.Such cultural differences with different expressions in different context,and the same approach will produce a very different expression language content.US cross-cultural communication,daily communication is one of the most common use of language behavior.This behavior has a language-specific expression of the nation as well as the form and content distinctive ethnic characteristics.If you do not understand these cultural differences in the understanding of the meaning of the language,it will use too unseemly,reach the purpose of communication,even cause misunderstanding and even resentment.This paper compares the daily communication on cultural differences in greeting,call and so on.