The present invention relates to a feeding assembly (1) for automatically loading a flexographic plate (5) in a treatment station (7). The assembly according to the invention comprises a punching unit of said plate (5), handling means (5) for moving the flexographic plate from a loading surface to said punching unit and from said punching unit to a housing site in which a pin bar (14) which can be connected to said plate (5) is arranged. According to the invention, the handling means are configured to connect the plate (5) to said bar automatically and to move the bar, at the end of such a connection, to a predetermined position in which it can be coupled to a treatment system (77) of said treatment station.