A Dream of Red Mansions is regarded as an encyclopedia of language and culture. The literary language in A Dream of Red Mansions, is based entirely on the Beijing dialect. But it carry on the processing and refining, eliminate dregs of spoken English, take its essence, make it become a mature and rich literary language. The Beijing dialect has significant characteristics, one is implicitness, another is vitality. Its role is to make the language more refined, the second is to make the characters more distinctive. The characteristics and functions are fully reflected in A Dream of Red Mansions. This paper will be “Matumoto”, ”Yito”, ”Iduka”, and “Inami”, who translated as dibon, for use in this book dialect translation were analyzed, and then to see the era of dialect translation features.