The invention relates to a hemp fiber manufacturing production line, in particular to a processing system for processing hemp into hemp fiber. The processing system for processing the hemp into the hemp fiber comprises devices for arranging hemp, degumming, dividing fiber and water washing, rinsing and softening, drying, softening and oiling, permeating and health maintaining, crush cutting and teasing, and combing and arranging; a degumming device comprises a mechanical degumming device, a biological degumming device and a high-temperature scouring-bleaching degumming device, and the device is special; a yarn hanging rack is composed of a hollow post and a plurality of hollow beams in a connecting mode, the hollow beams are provided with a plurality of hanging rods, and a plurality of holes are formed in the sides of the hanging rods; the crush cutting and teasing use a drafting roller set and a snapping roller set, and the drafting roller set and snapping roller set run in differential speeds and pressurize simultaneously. The combing and arranging use a round comb and a top comb to comb and a pulling vehicle to pull, along the rotating direction, the density of gill bars is increased gradually, and the fineness is reduced gradually. The processing system for processing the hemp into the hemp fiber changes a traditional hemp processing device, improves the long hemp yield and facilitates subsequent processing, and the produced hemp fiber is stable in quality.