Rocket propellant filling butt joint system

The invention discloses a rocket propellant filling butt joint system. The system comprises a base fixedly connected to a mounting structure, at least two filling pipelines, a butt joint assembly, andseveral rotating assemblies, wherein axes of end openings in the two ends of each filling pipeline do not coincide, all the filling pipelines are sequentially connected, the adjacent end openings ofevery two adjacent filling pipelines are connected in a rotating and sealing mode, and the filling pipeline at a head end is arranged on the base and connected with a filling medium output pipeline; the butt joint assembly is arranged on the filling pipeline at a tail end, and the butt joint assembly is used for being in butt joint with a filling port so that the filling pipeline at the tail end is connected with the filling port; and the rotating assemblies are arranged between the adjacent filling pipelines and used for driving the adjacent filling pipelines to rotate relatively so that thebutt joint assemblies move