阐述了中低层建筑的加层改造再利用。对原有建筑在其基础上进行核算、挖潜、加固、加层进行了论述。探讨了通常在结构体系中蕴藏着潜在的承载能力 ,提出了建筑物加层的各种结构处理方法。分析了地基土在附加应力的长期作用下得到压密、固结 ,从而提高了地基的容许承载力。当地基的容许承载力不能满足要求时 ,提出了如何进行基础加固处理和几种有效的处理方法 Expounds the middle and low-rise building re-transformation and re-use. On the basis of the original building on the accounting, tapping the potential, reinforcement, plus layers were discussed. This paper discusses the potential bearing capacity usually contained in the structural system and proposes various structural processing methods for adding layers in buildings. It is analyzed that the foundation soil is compacted and consolidated under the action of additional stress for a long time, so as to improve the allowable bearing capacity of foundation. When the allowable bearing capacity of the foundation can not meet the requirements, how to carry out the basic reinforcement and several effective treatment methods