The accelerated urbanization in low- to mid-income nations has led city dwellers to face more risks of serious disasters due to population density，climate change，property gaps，and so forth. The casualties and relative property losses in the low- and mid-income countries far surpass those in high-income countries because the urban poor in the former are highly vulnerable and their capability of surviving disasters is much lower than that of those in high- and mid-income level countries. The living conditions and density of the impoverished populations living in slums cannot be protected from urban disasters.In order to reduce the impact of disasters on the poor in low- and midi- ncome countries，the UN，concerned governments，and NGOs have noted that more than ten years will be required to achieve positive results in managing and renovating the slums and in providing experience for further action.