The invention provides a non-metallic pipe life prediction method which is a method used for predicating the life time of a flexible composite pipe based on linear regression by adopting a hydrostatic pressure residual strength method, performing linear regression on the logarithm of a residual bursting strength value and the logarithm of a hydrostatic pressure time by means of data obtained by hydrostatic pressure and bursting experiments to obtain a fitting straight line, and substituting a life compressive strength value to obtain the life time of the pipe; the prediction method provided by the invention is simple and easy to implement and can be used for predicting the life time of the flexible composite pipe quickly and accurately, and the method supports multi-point measurement and has verification and correction functions on a prediction result.