According to the present code for seismic design of building, the characteristics of freevibration and the time history of seismic performance of steelconcrete hybrid structure were carried out by using precise time integration method and Midas/gen software, the characteristics of freevibration, the displacement and acceleration distribution were obtained. The comparison of the results shows that the analysis results of precise timehistory analysis methods are in good agreement with two different Midas/gen methods. It is indicated that precise timehistory analysis methods and two different Midas/gen methods are the reliable ways to study the seismic performance of the structure.