With a case study of the application of the steel bar in the second highway project of Runcheng, this paper explores the reinforced lofting, processing and optimization during green construction. With the social and economical development as well as advancement of science and technology, cities in China are continuously expanding. There come the problems of a large population, too many high-rise buildings and an increasing demand for building materials, especially rebar. The government initiates the green construction concept, which calls for energy saving, land saving, material saving and water saving. Material saving is the priority, and rebar is the main building material, which becomes the main factor for construction cost. Therefore, both parties attach great importance to the accurate calculation of rebar, and professional rebar processing and delivery is essential for material saving during green construction.