Abstract: La defense in Paris is a well-known CBD in the world.After 40 years of development,it has reached a remarkable scale,being especially successful in the system of pedestrian and roadway dimensional-dividing.The article first analyses the development of this dimensional system,then studies the organization of the dimensional roadway and dimensional pedestrian and the transferred system.This experience is valuable for the development of CBD in our country.

Key words: dimensional development； la defense； the system of pedestrian and roadway dimensional-dividing；