Leakage current of fluorinated polyimide film was measured as function of time, electric field and sample temperature. Several existing conduction and charge transport mechanism was fit to the experimental results. It was concluded that the bulk limited Pool-Prenkel conduction mechanism was likely to dominate for the leakage current at high electric field (higher than 1 MV/cm) and Ohmic conduction was main conduction mechanism at low electric field (lower than 1 MV/cm).