In this article, we studied the microwave permittivity of the complex of the single-walled carbon nanotube and paraffin
in 2-18GHz. In the range, the dielectric loss of single-walled carbon nanotube is higher, and the real part and the
imaginary part of the dielectric constant decrease with the increase of frequency, and the dielectric constant possesses
the property of dispersion frequency response. The Hc, Hs and tanį of the complex of the single-walled carbon nanotube
and paraffin increase with the increase of the content of carbon tubes, and it presents good second-order function
relationship with the volume fraction of carbon in certain range. The polarization dispersion dielectric response is the
main reason that the single-walled nanotube absorbs and wastes microwaves.