Abstract: With the development of construction,such engineering activities as beach reclamation,ore stacking and preloading act are becoming much bigger than before.They will bring large-scale load and related problems.It is the same with the buildings in cities,which also has the characteristics of load with large-scale.It was investigated the relationship between city buildings and large-scale equivalent effecting load,and discussed primarily its effect on land subsidence.The influence depth of large-scale load is bigger than routine building load,but is smaller than the one calculated by routine methods,whose reason is interpreted.It is found that land subsidence is related to city construction in Shanghai.Bigger subsidence is induced in new area construction than old inhabited area,and bigger building density and bigger volumetric fraction caused bigger subsidence.These phenomena can be well understood according to the paper.As a result,the conclusion is drawn that with smaller density and bigger spacing,a highrise building will be more useful in reducing land subsidence than a low-rise building,which is thought to be helpful for urban planning.