The invention discloses an improved non-woven fabric dyeing production line. The improved non-woven fabric dyeing production line comprises an unreeling device, a dye vat, a transition area, a washing vat, a rolling device, an oven, a reeling device, multiple guide rollers, mesh belts and a frame body. The unreeling device, the dye vat, the transition area, the washing vat, the rolling device, the oven and the reeling device are sequentially arranged from front to back, and the dye vat, the transition area and the washing vat are arranged on the frame body; the guide rollers are arranged in the dye vat, the transition area and the washing vat and on the frame body, and the mesh belts are tensioned on the guide rollers; the unreeling device comprises a seat body, multiple rollers, two rails, an unreeling shaft, two guide seats, a sliding seat, a connecting seat, a regulating screw, a regulating disc, first bearings, second bearings, a regulating pressure applying device and two supporting bodies. Compared with the prior art, fixation and detachment can be convenient, fixing reliability is high, working efficiency is improved, product quality is improved, and the reeling degree of density of non-woven fabric is good.