In recent years, the protection and development design of historical blocks have been paid more attention, but at the same time, there are also problems such as the disorder of street space, the damage of building facades, and the lack of cultural characteristics, and the research on the riverside facade environment is relatively rare. "Urban double repair" is not only an effective way to improve the urban environment, upgrade the quality of human settlements and solve urban diseases, but also a necessary means to link the traditional historical blocks with the development of modern cities. Taking Yanhe Road of Yuncao ancient town as the research object, guided by the concept of "urban double repair", aiming at the existing problems such as buildings, building components and landscape sketches in its street facade, the paper puts forward four transformation principles and corresponding transformation countermeasures, namely, the principle of integrity, the principle of historical continuity, the principle of appropriate transformation, and the principle of aesthetic appreciation. It is hoped that the street view along the river and the revival of the ancient town can be reproduced, and the inheritance of the Yuncao culture can be promoted, which will be beneficial to the research on the reconstruction of the riverside street facade in the historical ancient town.