Abstract: Resorcinol formaldehyde(RF) aerogels with high RC ratio(molar ratio of resorcinol to catalyst) are prepared by using sol gel process. They can be dried at ambient conditions by solvent substitution. Carbon aerogels are formed by pyrolyzing the RF aerogels, and the grain and pore size, density and specific surface area of aerogels can be controlled by adjusting the RC ratio and the concentration of resorcinol. The micro structure of the porous carbon aerogels is measured by SEM and BET.