For the conventional structure, plane floor stiffness is very large. Vertical lateral force resisting members transfer level action for the coordination of deformation through the floor. According to the concept of seismic design principles, the floor openings to the structure of local earthquake are detrimental, but there is no clear design specification. Based on the existing engineering design information and combined with the understanding of the specification, this paper presented the treatment with floor partial discontinui- ty of the different R. C structures, if the stmcture is regular, we can use the rigid floor assumption to cal- culation, and otherwise we adopt elastic slab assumption to analyze the structure.