| As a well-known city with long history and civilization, Xi'an has made great achievement in the work of historical city protection, especially to the protection of bright city pattern and important cultural relic architecture. But there are very grave problems in the bright city transformation process, the shape of the city which is the main part of the historical remains is suffering the damage increasingly, which made the problem of protection very seriously. At the same time, since the development of city is inevitable, how to inherit and continue the architectural style and the Townscape Feature of the old city became an urgent thing.This paper take the modern architectural style and its vicissitude in the South Street of Xi'an as the research object, for it is located in the axle wire of the city and played an important role in protecting and inheriting the city characteristic and the cultural character, with the East, West, North streets undertook together, which has reflected the Townscape Feature of Xi'an recent years to a great degree.The paper reviewed the urban planning of Xi'an and the influence and the change in the material shape and the construction thought made by the avenue transformation plan in 1980 ages. After that, the author discussed the produce and development and many other related reasons of the architectural style, and commented on the construction process and present station about South Street, throughout the inspection on the spots, the survey of residential questionnaire, talking with the architects, collecting informations of building and the environment analysis about creation, combined with the theories of history environment protection home and overseas.Finally, the paper discussed the characteristic of the Architectural style in South Street and the development tendency under the background of the overall characteristic of the old city and the cultural, proposed a series of supposes to rethink the relations and the function between the avenue style and the tradition style forms of the city.Promoting the bright city protection and the development thought pondered again,hoping that it can take an anticipation and model function to the produce of the overall feature of the ancient city of Xi'an. |