Deviation rectification of buildings is an arduous task because of its technical difficulty and high risk. So far, the theory of deviation rectification and reinforcement is still incomplete and need to further improvement. In order to investigate the mechanism and construction methods of deviation rectification and reinforcement of buildings, first the paper addressed damage status of inclined buildings in a residential area. And then the causes leading to buildings inclining were analyzed in three aspects. Subsequently, the key construction technologies of rectification and reinforcement were demonstrated. Next, the mechanism of rectifying process was analyzed, and the formula to calculate the amount of steel pipe pile used for deviation rectification and reinforcement was presented. On the basis of research above, some remarkable conclusions are acquired for the engineering rectification and reinforcement, which provide helpful reference information for the similar building rectification engineering.