This paper mainly discussed the relation between human behave and space configuration, in order to analysis and optimize the space of urban commercial pedestrian street. In this paper, Xi'an Shu-Yuan-Men commercial pedestrian space has been chosen as a case study. Firstly, a model has been built by using space syntax on the basis of the space network, and an analysis and optimization has been offered from the technical level. Secondly, combined with space network, by recording and analysis of the human behavior, a feedback has been offered to the model according to the actual needs. At last, a final comprehensive optimization plan has been carried out. The purpose of this plan is trying to improve the shopping and leisure environment of the mall and comprehensive Land use efficiency.