The invention discloses a tension-free towel slitting machine. The machine includes a cloth feeding frame base, a slitting machine rack, a cloth discharge frame, universal wheels, supporting legs, a cloth feeding frame, a guide roller fixing plate, baffles, cloth passing guide rollers, a first cloth guide roller, a baffle connecting rod, a sliding rail, a second cloth guide roller, a cloth-feedingopposite-side aligning device sensing mechanism, a cloth guiding plate, a third cloth guide roller, a fourth cloth guide roller, a fifth cloth guide roller, a hydraulic driving mechanism of a cloth-feeding opposite-side aligning device, a jacking mechanism, a cutter anvil rod, annular cutter anvils, pneumatic cold cutting blades, a cutting blade guide pipe, a first cloth pulling roller, a motor,a transmission wheel, a belt, an eccentric connecting rod, a cloth arranging mechanism, a sixth cloth guide roller, a second cloth pulling roller and a seventh cloth guide roller. The tension-free towel slitting machine can solve the problems that traditional slitting machines are large in energy consumption during cutting, uneven in cutting, large in cutting tension and the like.