Abstract: Nanocomposites consisting of particles of Nd2Fe14B and α-Fe have been prepared from a compound NdxFe94-xB6 (x=9.5, 10.5, 11.5) by melt-spinning techniques. The effect of Nd content on microwave permeability and the nature resonance frequency was studied. Phase structure, microstructure, static magnetic property, and microwave electromagnetism property were analyzed by the ways of XRD, VSM, and a vector network analyzer. The result shows that the nature resonance frequency of the nanocomposites increase from 6.53 GHz to 15.91 GHz, and the imaginary permeability (μ"r) of the nanocomposites gradually reduces from 1.59 to 0.56 with the increase of Nd content from 9.5% to 11.5%.