The invention relates to the technical field of profile machining, in particular to a special-shaped knurling die conveniently knurling various patterns. The knurling die comprises a workbench, wherein two sets of linear modules are symmetrically arranged on the top of the workbench, sliding tables of the two sets of linear modules are correspondingly provided with a first support and a second support, and a first rotating shaft and a second rotating shaft are rotationally connected to the first support and the second support respectively; a pressing roller is on the opposite inner sides of the first support and the second support, one end of the pressing roller is hinged to the second support, and the other end of the pressing roller is provided with a protrusion; and an opening groove isformed in the first support, the middle of the pressing roller is sleeved with a knurling sleeve, and the two sides of the knurling sleeve are correspondingly provided with a pin and a positioning ring. According to the knurling die, a traditional knurling roller is divided into the pressing roller and the sleeve for printing the different patterns, the pressing roller and the rotating shafts arefixed through a hinge and a bolt, when the different patterns need to be replaced, fixing between the pressing roller and the rotating shafts is relieved, the pressing roller is taken out, and then pattern replacing is carried out, so that working efficiency is improved.