Urban renewal has become the focus of urban construction by replacing the rough expansion with the micro-transformation and high-quality development. On the one hand, the reconstruction of old communities should pay attention to effectively improving the living comfort level of residents, and on the other hand, it should strengthen the energy saving, environmental protection and green. Based on the investigation cases of wall optimization in various communities in Chengdu, this paper explores the green wall reconstruction strategy of the Northwest Street community of Fuqin Road in Chengdu, and proposes the strategies of low-economy and micro-transformation, green and beautiful, and intelligent wall module space, aiming to provide reference for the reconstruction of old communities in Chengdu.