Ｒesilience factor is an important factor to be considered in disaster loss assessment; however，there are few literatures that quantitatively evaluated the effect of resilience on reducing disaster losses． In this paper，factors of disaster resilience are taken into consideration to improve the CGE model，and the“7·21 severe rainstorm”in Beijing is used as an example to compare and analyze the role of resilience in reducing disaster losses． The results show that the magnitude of disaster reduction caused by resilience can be quantitatively assessed，when incorporating the disaster resilience factors into the production module of CGE，by investigating the change of elastic parameter value caused by reduction of labor and capital factors in the production function． Taking the“7·21”rainstorm in Beijing city as an example，it is found that the loss rate of various economic indexes has been reduced after considering the resilience factor，and the recovery degree of each industry sector is different． This paper expands the series of researches on Ｒose and so on，and supplements the quantitative evaluation of disaster restoration． The results can provide an empirical reference for the government and other departments to carry out resilience construction and post disaster emergency management．