The invention relates to a film coating system. The film coating system comprises a plate guide conveying mechanism; the plate guide conveying mechanism includes a plurality of groups of fixed wheels;the outer sides of the multiple groups of fixed wheels are correspondingly provided with regulating wheels; each regulating wheel and the corresponding fixed wheel are concentrically connected; regulating mechanisms are used for correspondingly regulating the regulating wheels and the fixed wheels to get close to or get away from each other; a driving mechanism is used for driving the fixed wheels and the regulating wheels to synchronously rotate in the same direction; each regulating wheel is provided with a holding mechanism; guide conveying is performed on plates along a passage formed bythe holding mechanisms, the fixed wheels and the regulating wheels; each fixed wheel and the corresponding regulating wheel cooperate in an adjustable manner; distance between each regulating wheel and the corresponding fixed wheel is regulated by the corresponding regulating mechanism so as to adapt to the film coating operation of plate blanks different in width dimension; and in a process thatthe driving mechanism drives the fixed wheels and the regulating wheels to synchronously rotate in the same direction, guide conveying of the plates is realized. The system is capable of performing film coating operation on the plates different in size, so that the goal of increasing the production efficiency can be achieved while the production cost is effectively reduced.