Business correspondence discourse,an important means of communication in business practice,is crucial to the business communication.On the basis of such western rhetoric as Bitzer's rhetorical situation,Aristotle's rhetorical appeals and Burke's identification,the paper explores the rhetorical construction of business correspondence discourse.To achieve the discourse rhetorical effect,the writer of business correspondence should take into consideration the rhetorical situation of business activities,make use of the concept of identification and traditional rhetorical appeals to achieve identification between the writer and audience,which would facilitate the rhetorical interaction among the business participants and ensure the successful business communication.