In order to improve the disparity between the rapid development of the city and the activation and protection of the vitality of the historical neighborhoods, the urban cultural discrimination is increased. Based on AHP technology, this paper puts into the evaluation index of historical street area from four aspects of economy, society, ecology and environment, and establishes a system for comprehensive evaluation of vitality of urban historical blocks. It is also a strong practice in Changsha Wenmiaoping Historic District. explore.