This study is used carbon fiber that compound knitting fabric to make electromagnetic wave absorption curtain, except to use the knitting structure of the three-dimensional and fluffy characters. The mainly is performs the fabric to fold the fabric to observe electromagnetic wave absorption effectiveness, and use the different combination of needle circle specification and degrees rotation to examine electromagnetic wave absorption effectiveness. After analyze experiment statisics, we can find out the best absorption value of 31dB at carbon fiber composing the 12th needle circle specification, and carbon fiber is rolled by polypropylene fiber can achieve its absorption values of 35dB when compose 20th needle circle specification after extra work. Regardless of a material what kind of specification, the absorption values is no biggish difference when N6K compare to N12K or Y6KP compare to Y12KP.
