Let-off tension adjusting device

The utility model discloses a let-off tension adjusting device, which relates to the technical field of textile equipment, and comprises a pay-off rack, a pay-off roller transversely arranged in the pay-off rack, a driving mechanism and an adjusting component, transverse tension rollers are symmetrically arranged on the front side of the pay-off roller up and down, arc-shaped through grooves are symmetrically formed in two side parts of the pay-off rack, and the adjusting component is arranged in the arc-shaped through grooves. Through the arrangement of the driving mechanism and the adjusting assembly, the motor is controlled to operate, the ring seat is driven to rotate under the meshing of the driving gear and the outer gear ring, and the driven gear I and the driven gear II are driven to synchronously rotate under the meshing of the inner gear ring with the driven gear I and the driven gear II respectively. The pay-off roller and the two tension rollers rotate synchronously, it is guaranteed that when the