Abstract: Wave absorbing mechanism and research of current status of carbon fiber（felt） as absorbing material are introduced. It is pointed out that the modifying of EM character is main task at present. There are following ways for modification of the EM character:structural arrangement,noncircular section, surface adulteration,micro-coiled stucture. The micro-coiled carbon fiber（MCCF） shows broad pros- pect of application because of its special helix characteristic.