Beimeng Suoyan is a fiction of historical sketches written by SUN Guang-xian of late Tang Dynasty, Which is of great significance from the perspective of corpus source because the language of this work is more oral. This paper, through investigation of semantic,morphological and word-order formation of the coordinated disyllablie words in BeimengSuoyan, shows the charicters of the coordinated disyllablic words of Tang Dynasty.