Based on specific environment conditions, including geographical, climate and historical aspects, the traditional villages in southern Hebei province has formed their own main street space interface features. However, in new or rebuilding designs, almost all street space features have disappeared, because of no deep research results. At present, the researches on street space of traditional villages in China focus on spatial form recognition, the space redesign, and the protection of their features. While the methods mostly focus on description and interpretation. With the introduction of space syntax, the quantitative study on villages’ street morphology has gradually been emerging. However, it is not proper to provide the specific mathematical indicators for their interface morphology on villages’ renewal. In America and Europe, there are many research results on street interface morphology. And the methods mainly involves five directions: index system, mathematical model, space syntax, fractal theory and 3S technology. In geography, the mountain area of southern Hebei province, is located in the boundary zone between mountain and plain. The terrain descends from east to west. The land-forms mainly include mountains, hills and basins between them. The traditional villages mainly distribute in west of Handan City, including Shexian, Wuan, Cixian and Fengfeng. Totally 31 villages have been selected in the national traditional village list. In landform and topography aspects, there are many similarities and differences, and all of them have formed the regional characteristics of the street-lane interface. Because development speed of them is relatively slow, the Ming and Qing Dynasties’ features of dwellings and streets has obviously been kept. Based on the relation between main street and mountain contours, streets should be divide into three types: parallel, vertical and oblique to the contour line. The nine traditional villages has been chosen as samples. Based on research results on urban street interface, system modes of index and fractal theory, this paper constructs a quantitative analysis framework for street interface morphology. The framework includes sample data collection, the parameters’ selection and calculation method etc.