Abstract: In this paper,the sound-absorbing properties of the domestic stainless steel fiber cotton and fiber felt have been measured and examined for the first time under the conditions of different bulk density and thickness,These materials have been used in textile industry as mixed spun fabrics(e.g.for the shielding clothes)Their properties were Compared with the acoustic properties of glassfiber cotton.The results shown that sound-absorbing properties of the stainless steel fiber cotton and fiber felt are fine ,and it can be used on the special situation such as high temperature ,high moisture and corrosive media.