The invention discloses a feeder. The feeder comprises an unwinding assembly, a receiving assembly, a traction mechanism and a marking assembly, wherein the unwinding assembly is in transmission connection with the receiving assembly, the receiving assembly is in transmission connection with the traction mechanism, the traction mechanism is connected with the marking assembly, the traction mechanism comprises a reference plate, and the traction mechanism is detachable. According to the feeder, the reference plate is arranged on the traction mechanism, so that unify of an installation referenceplane are ensured, feeding and material stripping is more stable, the problem that a material belt is prone to be pulled is solved, and the abnormal shutdown time of line production equipment is shortened.