Abstract: At present,energy savings and environmental protection are increasingly advocated in the process of social development, and developing green industries has been a problem about which the whole society is concerned. In the construction industry, green assembled steel structure building has the advantages of environmental protection and energy savings; therefore, it has been widely used in the real world with bigger development space.In the green assembled steel structure building system,the green assemble steel structure building takes building components or building functional units as a basic element and makes itself be characterized by production factorization and maintenance integration through combination of the elements. Based on that, the paper conducts a brief analysis on green assembled steel structure building system in hope of being able to offer a reference.