Shaping device and shaping method preventing blockage of conveyed paper of packaging machine

The invention discloses a shaping device and shaping method preventing blockage of conveyed paper of a packaging machine. The shaping device comprises a base and a shaping piece which is arranged in the base and is adjustably connected with a first vertical plate of the base through a first connecting piece; one long side of the shaping piece is provided with two arc-shaped protruding parts which make contact with the conveyed paper in the horizontal direction, and the shaping piece is fixed to the base through a second connecting piece; the shaping piece is connected with a second vertical plate of the base through an elastic connecting piece; the first connecting piece and the second connecting piece can be bolts; the elastic connecting piece can be a spring; when the conveyed paper perpendicularly enters a printing mechanism after passing through a paper feeding guiding wheel, the two arc-shaped protruding parts which can be in the shape of an ox horn generate a horizontal feeding amount on the perpendicul