The soil under foundation of building deformed by the top load of which the value depended on not only the size and distribution of building loads, but also the type, distribution, and compression character of foundation soil. If the excessive pressure overloaded the foundation bearing capacity, the foundation would loss stability and breakage. Uneven foundation sedimentation will make the upper building crack. Therefore, the calculation method for foundation sedimentation is very important to guarantee the safety of buildings. In this paper, the calculation theories and methods for foundation sedimentation were compared and the relative preventive measures of disaster were illustrated.