Abstract: The design and assembly correctness of launch-vehicle’s interface polarity concern the flight success or failure.To make sure the polarity is correct during the launch-vehicle’s designing and production-manufacturing process,a method that can be used in a closed-loop double dimensions way for checking the correctness of design polarity and assembly polarity is presented.The method was used to check and confirm the new generation large scale launch-vehicle’s interface polarity in a closed-loop way,which strengthens the closed-loop management and control both of the polarity designing states and of the product’s assembly process,and which makes sure of the designing correctness and adaptability of the interface polarity.

Key words: Launch-vehicle, Design polarity, Assembly polarity, Closed-loop management and control