The utility model relates to the field of cable identification jet printing, in particular to a cable identification jet printing positioning tool which comprises a sliding frame. The device further comprises a first motor, a first lead screw, a first sliding block, a supporting base, a movable frame, a rotary knob, a two-way screw rod, a second sliding block and a clamping wheel. According to the utility model, the first motor is arranged, the first lead screw rotates when the first motor operates, the first lead screw drives the first sliding block to move when the first lead screw rotates, and the first sliding block drives the rear side supporting seat and a part connected with the rear side supporting seat to move when the first sliding block moves, so that adjustment is carried out along with the length of a cable; when the two-way screw rotates, rotation of the two second sliding blocks is limited through the movable frame, so that the two second sliding blocks are driven to move relatively, when the two second sliding blocks move, the two sets of clamping wheels are driven to move, the two ends of the cable can be clamped, and after the two ends of the cable are clamped, the cable is straightened by controlling the position of the first sliding block. Therefore, the cable can be straightened and fixed to facilitate jet printing.