Along with the improvement of social living standards and entering into an aging society,improving and enhancing the living quality have become the basic requirement of the residents.Equipping elevator to the multiple dwelling has become an effective way for improving the living quality,and raise the concern of government,society and residents,which also being a social problem need to be addressed.However,less focus on the impact that equipping elevator will bring to the living environment.On the one side,elevator will make residents live more convenient,on the other side,equipping elevator in different place of multiple dwelling may cause the changes in peoples way of life,whats more it may affect the indoor ventilated and daylighting of some residents,as well as the using of social public space.Especially in the south area of China,such problems related to the comfort level and health of peoples live.At present,basing on the computer fluid dynamics and the analysis of computer numerical computations and picture,numerical simulation make accurate analysis of physics system related to the fluid flow and heat transfer.With the advantage of low cost and easy to simulate the real situation,numerical simulation has become the important research methods in the area of planning and building environment design.Base on the CFD simulation of indoor natural ventilation environment before and after equipping elevator in multiple dwelling built during 1970s to 1990s in Guangzhou,analysis and evaluation the simulation results of different house types equipping elevator and different ways of equipping elevator.Though comparative analysis of the changes of indoor ventilation environment before and after equipping elevators,regularity summarized was made according to the simulation results in this paper,as well as design to investigate the existing problem.From the simulation results,it clearly indicated that the change of indoor natural ventilation can caused by equipping elevator and may influence the comfort degree of living environment,indoor pollutant exhaust,worse indoor air quality in winter and increasing frequency of using air condition or electric fan in summer.If these design methods can be used in the work of equipping elevator,residents may less affected by equipping elevator.Whats more,equipping elevator can play a role in optimize the indoor environment.