The invention discloses an SF6 breaker remaining life assessment method and belongs to the technical field of breakers. The SF6 breaker remaining life assessment method comprises the steps of confirming the information amount for breaker remaining life assessment by analyzing factors influencing the breaker life assessment, dividing state quantities into basic parameters, operating parameters and defect management parameters according to established project models, using a analytic hierarchy process to confirm weight allocation of the state quantities, establishing a breaker three-layer parallel life assessment model based on a health index formula, and using the established formula to analyze and calculate the health level index, the remaining life and the fault probability of a breaker. The method is used for judging the life of a high-voltage breaker in an incomplete life test and is especially suitable for a product with a long life cycle. Possibility is provided for operation cost saving of a power system and improvement of operation safety of the power system.