The half through steel truss simply supported structure is adopted for overpass spanning Dongpinghu Street in Shenyang City with a calculated span of 30.7 m.Based on the overpass,MIDAS Civil software is used to calculate the structure of the overpass.The design calculation process and structural characteristics of the simply supported steel truss bridge are analyzed,and its main design ideas and methods are also explained.The research results can provide reference for the design of similar steel truss overpasses.