Knife pouch assembly for slitting knife and slitting knife capable of conveniently adjusting slitting specification

The utility model discloses a cutter sleeve assembly for a slitting cutter and the slitting cutter convenient for adjusting the slitting specification, which are applied to adjusting the interval width between adjacent blades in the slitting cutter and comprise a first cutter sleeve and a second cutter sleeve which can be sleeved on a core shaft of the slitting cutter and are supported between two adjacent blades, the first knife pouch and the second knife pouch are coaxially arranged and movably connected together in a sleeved mode through an inner thread structure and an outer thread structure which are matched with each other to form a knife pouch assembly, so that the axial supporting width of the knife pouch assembly can be adjusted by rotating the first knife pouch or the second knife pouch. The slitting specification adjusting process is fast and convenient, the axial supporting width of the cutter sleeve assembly can be adjusted only by rotating the first cutter sleeve and the second cutter sleeve, th