With the improvement of people's demand for traffic and surrounding living environment, the rapid and low-impact construction is more and more used in urban engineering construction. The multi-beam steel-concrete composite beam bridges have the advantages of short construction period, low impact on traffic, factory production, moderate cost, and ability to match the precast construction of standard section in the construction of urban bridges, which can ensure the uniformity of the whole landscape, effectively alleviate the contradiction between construction and traffic conflict, and then be used in the urban viaduct, and is a relatively new structural form of urban bridges. Through the comparison and analysis on various calculation methods of steel-concrete composite beams, the results show that the multi-beam steel-concrete composite beam bridge has the good stress performance and has the strong popularization value in urban viaduct.