Currently, the high light transmittance and high haze thermally conductive polyimide film with excellent comprehensive performance exhibits great application prospects, while there are still challenges for achieving. Here, boehmite nanowires (BhNs) with an aspect ratio up to 60 for the modification of transparent polyimide (CPI) derived from the polymerization of fluorodiamine and fluorodianhydride, are prepared. Due to the unique size and orientation distribution of BhNs in CPI films, the as prepared CPI-BhN composite films show in-plane thermal conductivity up to 5.89 W m