The invention discloses a metal nano polymer-conducting polymer and a preparation method thereof. The core is an Au nanoparticle polymer, and the shell is a poly-bis-alkyne conducting polymer. The preparation method comprises the following steps: modifying a precursor 4-acetylenylaniline onto Au nanoparticles to form bis-alkyne as the coupling reaction of the 4-acetylenylaniline occurs, polymerizing the bis-alkyne to generate a poly-bis-alkyne conducting polymer, and meanwhile, coupling the Au nanoparticles to form a polymer; and controlling the stirring rate and reaction time to obtain the core-shell-structure metal nano polymer-conducting polymer. The method disclosed by the invention has the characteristics of simple process, favorable reproducibility, high universality and the like; and the core-shell structure prepared by combining the metal nanoparticle polymer and conducting polymer can provide contribution of hotspots, has favorable dispersity, and plays an important role in research and application in the fields of optics, biomedicine, analysis detection, biosensors, environmental manipulation and the like.