The invention provides an automatic packaging production line for finished pens. The automatic packaging production line comprises a packaging device body. The packaging device body comprises a feeding body, a packaging box opening mechanism, a material combining conveying mechanism, a box closing device body, a stacking mechanism, a material combining mechanism and a detecting device. By means ofthe automatic packaging production line for the finished pens, automatic feeding, filling, packaging and stacking of the finished pens are achieved, the blank of an automatic production line of the pen industry is filled up, meanwhile, the finished pen boxing space is saved, the finished pen boxing automation degree is improved, and the overall production efficiency is improved. The automatic packaging production line for the finished pens is reasonable in design, ingenious in concept and capable of facilitating automatic implementation and facilitating pen industry application and popularization.