Natural renewable and degradable potato starch was used as raw material to synthesize a flexible trans-parent film which can be repeatedly bent and folded. Conductive silver nanowires were prepared by pol-yol method and coated evenly on the surface of starch film by spin coating. The two are combined by in-termolecular force.The morphology, structure and stability of the product were analyzed and the influ-ence law and application efficiency of composite conductive film were explored. The light transmittance of the starch film obtained by experiment is 92%, the roughness is 3.92nm, and the tensile stress is 29.01MPa；Conductive silver nanowires are 60nm in diameter and over 20um in length. The deposition density of silver nanowires has obvious influence on the conductivity, light transmittance and roughness of flexible transparent conductive films. With the increase of the deposition density of silver nanowires, the square resistance decreases, the light transmittance shows a linear decreasing trend, and the rough-ness increases accordingly. When the deposition density exceeds 300mg/m2, the square resistance Rs is lower than 22.6 ?/□, the light transmittance T is about 65%, and the photoelectric excellent value F.O.M is higher than 35. Therefore, it is a good substitute material for ITO conductive films. When the compo-site film is repeatedly bent and folded, the change of the square resistance is less than 5%, thermogravi-metric analysis found that the thermal decomposition temperature is higher than 250 ℃ ，Which is fa-vorable for further high-temperature conductive treatment and the square resistance increases slightly with time when the composite film is placed in air.