Crossing the south and north sides of Chaoyang Gate-Fucheng Gate Line in the “Axis and Line” pattern of Beijing Old City and embracing massive cultural relics at national，municipal or district level like Guangji Temple，Emperors Temples and Longchang Temple，Xisibei Area，as one of the 43 Historic Reservation Areas of Beijing，possesses abundant historical and cultural connotation. The Area，however，is suffering problems of poor environment and insufficient public space in recent years as a result of the growing population and the changing urban environment，which bring forward inconvenience and difficulties for people’s daily life. It remains an urgent issue for proper urban management as to how to keep，restore and carry on the traditional and cultural features of historic blocks while ensuring convenient life of the public. In this light，the article，driven by the problems of Xinjiekou Sub-district，identifies problems of the greatest public concern and figures out a lean alley management model by integrating environment upgrading，systematic management and social services in the principle of small-sized and progressive organic renovation.