The utility model discloses a to be an ability utilize cotton stalk the physics effect such as cut up with a hay cutter, strikes, rubs, rubs with the hands and become a length flaky equipment even, soft in small, broken bits for cotton straw silk machine, this machine, including constitutions such as conveyor, reducing mechanism, frame, power transmission unit, its characterized in that conveyor links to each other with the reducing mechanism, installs in the frame, and it has the compression roller to be located the reducing mechanism feed inlet. Dynamic conveyer in the frame provides power for reducing mechanism and conveyor. The stationary knife is installed and is being moved the knife rest surface, moves to be equipped with on the knife rest and moves the arbor, and the multi -disc is moved that the sword is installed on moving the arbor and is separated into the certain distance by the spacer sleeve, and the sword moves in every group and adjacent to move the knife tackle crisscross, rubs the board and is located inside the reducing mechanism to keep certain clearance in moving the sword top.