A plant graft production line for automatically grafting a rootstock and a scion si disclosed. The aforesaid plant graft production line comprises (a) a closed-loop conveyor； (b) at least one grafting assembly arranged for transporting along said conveyor； the assembly further comprises a rootstock holder for holding the rootstock and a scion holder for holding the scion； the holders arranged for at least partially superimposing said rootstock and scion； (c) stationary cutting mechanism for cutting exposed rootstock surface； (d) a stationary cutting mechanism for cutting a exposed scion surface to be； (e) stationary clipping mechanism for clipping the superimposed rootstock and scion together. It is a core feature of the invention to provide the rootstock holder arranged so as to provide a curvilinear plane along which said rootstock is conformed thereby presenting a curved cutting target for the cutting mechanism.
