The invention provides a band-shaped flaky tobacco adhesive-free splicing device comprising a base plate, splicing frames, a splicing tooth roller, a splicing smooth roller, splicing rotation shafts and transmission devices. Two motors drive the splicing tooth roller and the splicing smooth roller to rotate correspondingly, by means of squeezing of the splicing tooth roller and the splicing smoothroller, overlapped sections, between the splicing tooth roller and the splicing smooth roller, of new and old band-shaped flaky tobacco are rolled into a whole, point-like protrusions densely arranged on the splicing tooth roller are utilized to roll dense small holes on the overlapped sections of the band-shaped flaky tobacco, the dense fine small through holes generate overturning deformation,the overlapped sections can generate large enough resistance force in the material operation direction, the resistance force can resist the tension force borne by the flaky tobacco during normal production, so that the overlapped sections are prevented from being snapped, adhesive-free splicing of the flaky tobacco is achieved, use of adhesive type matter is effectively avoided, harmful matter isreduced, and material cost is lowered.