The invention relates to a
cable tension adjusting device which is simple in structure, convenient to operate and convenient for tension adjustment. The
cable tension adjusting device comprises a rack, a pay-off roller, a guide roller, a driving mechanism I, a driving mechanism II and a braking mechanism, wherein the rack is provided with a vertical plate I, a vertical plate II and a top plate, the pay-off roller and the guide roller are movably arranged between the vertical plate I and the vertical plate II, and the pay-off roller is positioned above the guide roller; the driving mechanism I comprises a driving wheel I, a driving wheel II and a support, and the driving wheel I and the driving wheel II are movably arranged on the support; the driving mechanism II comprises a driving wheel III, a hinge rod, a pull rod I and a pull rod II, the driving wheel III is connected to the hinge rod, and the hinge rod is hinge to the vertical plate II; the braking mechanism comprises a
brake block and a
brake disc, the
brake disc is connected to the pay-off roller, and the brake block is connected to the pull rod II through a cross rod. The
cable tension adjusting device has the advantages of being convenient to process and low in cost.