The limit state design method was adopted for railway superstructure design in 1991 and substructure design in 1997. They deal with large scale earthquake (M=8, Epicentral Distance=40km) and consider very large ground acceleration. But January in 1995, the huge earthquake attacked the Southern Hyogo prefecture. The scale of this earthquake is far larger than the scale considered in the present design guideline. Therefore it can be said that the establishment of the foundation design method which consider such a large scale earthquake force is an urgent necessity. In this paper the authors describe the proposition of the design method of spread foundation considering large scale earthquake force.