The utility model discloses a line is adjustable jigs for cutting process, including base, horizontal migration device, layer board elevating gear, supplementary work piece closing device, the base on is provided with horizontal guide rail groove and upright guide rail groove, the horizontal migration device for setting up the rack and pinion mechanism on the base, layer board elevating gear include screw nut mechanism and support, said support lower extreme is provided with sliding bracket base and fixed bolster base, and the sliding bracket base is inlayed in the spout of rack sliding bottom upper surface, and the spout right-hand member at rack sliding bottom upper surface is fixed to the fixed bolster base, sliding bracket base and fixed bolster base and lead screw constitution lead screw drive mechanism, support upper end is provided with the work piece layer board, said work piece layer board top is provided with locking screw and work piece clamp plate, and locking screw fixes on the work piece layer board through compressing tightly the piece, supplementary work piece closing device include high backup pad, backup pad regulation lead screw, clamp plate guide way, locking screw, work piece clamp plate and compress tightly the piece, said high backup pad is screw nut mechanism with the regulation lead screw, and the lead screw is connected with the base bearing, the work piece clamp plate be equipped with constant head tank and locking screw. The utility model discloses a but the line is adjustable jigs for cutting process centre gripping is not unidimensional, the work piece of shape to stability is good, and the practicality is strong.