The invention discloses a carbon nano tube-carbon nanorod-PTFE micro-nano composite and a preparation method thereof. The carbon nano tube-carbon nanorod-PTFE micro-nano composite is obtained in the way that a carbon nano tube and carbon nanorod powdery mixture and polytetrafluoroethylene powder are crushed to prepare micro-nano composite powder, and the micro-nano composite powder is subjected totwin-screw extrusion molding and granulation. The carbon nano tube-carbon nanorod-PTFE micro-nano composite has the tensile strength of 30-40%, the bending strength improved by 5-10%, the frictionalcoefficient reduced by 5-10% and the wear rate reduced by 90-98%. The carbon nano materials with the two properties of carbon nano tubes and carbon nanorods can achieve a synergistic effect and mutually make for defects to realize comprehensive improvement of the polymer performance; in the aspect of the filling effect, the performance after filling is remarkably improved; and the mechanical performance and the wear-resisting performance of the composite are obviously improved.