Metallized film capacitor（MFC）is inevitably affected by higher temperatures and humidity during the long term application，which accelerates the electrode corrosion rate and reduces capacitance. In view of this issue，in this paper the life data of MFC under different temperature and humidity conditions is obtained based on the THB accelerated aging test，the two-parameter Weibull distribution model is used to calculate the MFC life parameters，and the life acceleration factors under different temperature conditions are obtained by combining the Arrhenius model，the inverse power law model and the Hallberg Peck model，and the influence of temperature and humidity on the life of MFC is analyzed. The results show that for the MFC under different temperature and humidity，with the increase of temperature and humidity，the capacitance decreases fast and the life of capacitor reduces，the adverse effect of temperature on the MFC life is more significant than that of humidity. With the increase of temperature and humidity，the Weibull distribution of MFC life migrates in the direction of decreasing life，which provides effective reference for the life prediction and application of MFC.