| Dong da jie street of Xi'an, science the formation on the beginning of last century, has become the most famous commercial area in Xi'an, and it is the last traditional avenue without housebreaking and rebuilding on large scope. People can feel the strong traditional atmosphere and historical tinge in this street space, but the appearance of this street is fashion, vogue and inconstant.The thesis took the Dong da jie street's surface as research target from the evolution of urban form angle.After study the history of construction and commercial development of Dong da jie street, this thesie analyzed the Dong da jie street's surface in many way and by the numbers.At last the thesis put forward 1hat formation and inheriting the city's historical feeling have closely relation with the deep structure of city and street form. And the key point for preservation of the historical city is to protect the deep structure of city's form. |