Death of a Salesman,the classic tragedy of Arthur Miller,has aroused world wide critical interest.Various studies and reviews have been made about it from different angles.Different from previous reviews and studies,this thesis tries to probe into a nearly undiscussed issue,analyzing the relationship between Biff and his mother Linda from the perspective of Oedipus complex,which is actually a thread going through the whole play.On the one hand,Biff bears unusually deep and tender love for his mother; on the other hand,Biff’s spiritual killing of his father and later his father’s physical death together provide a chance for him to take his father’s place.Unconsciously Biff realizes his Oedipus complex. Death of a Salesman, the classic tragedy of Arthur Miller, has aroused world wide critical interest. Various studies and reviews have been made about it from different angles. Different from previous reviews and studies, this thesis tries to probe into a nearly undiscussed issue, analyzing the relationship between Biff and his mother Linda from the perspective of Oedipus complex, which is actually a thread going through the whole play. On the one hand, Biff bears unusually deep and tender love for his mother; on the other hand, Biff’s spiritual killing of his father and later his father’s physical death together provide a chance for him to take his father’s place. Unconsciously Biff realizes his Oedipus complex.