The invention discloses a method for automatically packaging a tubular product. By steps of punching bags, installing tubes, inserting the tubes, lifting, wrapping the tubes, exchanging air, thermally encapsulating and cutting, emptying a position and the like, automation is realized in the whole process, complicated carrying work in manual packaging operation is avoided, production and working efficiency is improved, labor intensity of packaging is reduced, and production cost is lowered greatly; therefore, the method is matched with a tubular product extrusion production line, so that automatic continuous production and packaging of the tubular product can be realized.