Reeled yarn unwinding device

The invention discloses a reeled yarn unwinding device. The reeled yarn unwinding device comprises a drive mechanism, a tension monitoring mechanism located below the drive mechanism, a controller anda reeled yarn shed frame. The drive mechanism and the tension monitoring mechanism are connected with the controller. The reeled yarn shed frame is arranged on the drive mechanism. The tension monitoring mechanism comprises a mounting seat, two fixed guide wheels, a moving guide wheel, a sliding gear rack, a drive gear, a drive shaft, a constant-force spring I, an outer shell, three inductors andan inducted body. The two fixed guide wheels and the sliding gear rack capable of being mounted in a sliding manner are arranged on the outer side of the mounting seat. Compared with the prior art, the phenomenon of breaking or loosening can be greatly reduced, the structure is simple, constant-force tensioning is achieved, yarn can be taken easily, the peripheral diameter can be adjusted, and adjusting is convenient and