In order to improve the dispersion ability of carbon nanotubes, carbon nanotubes was adorned and modified, first multi-walled carbon nanotubes (MWCNTS) were purified, then the processed MWCNTS was modified,finally, the surface of MWCNTS was modified by various surface modifiers, and the dispersion of the modified MWCNTS in different solvents was also studied. In order to investigate the effect of MWCNTS on the compatibility of polyether ether ketone (PEEK) composites, making use of the solubity of PEEK and DMF, and comparing with three kinds of solvents, water, ethanol and DMF, the modified MWCNTS prepared by PEEK composites, a-MWCNTS, CTAB/MWCNTS and g-MWCNTS, were chosen which are in favour of the preparation of modified MWCNTS PEEK composites. It is put forward that in the future the preparation technology of PEEK/CNT composites should be continuly studied to improve the dispersion properties of carbon nanotubes and promote the friction and wear properties of composite materials.