Preparation method of acrylon pulp

The invention relates to a preparation method of acrylon pulp. The preparation method comprises the steps of preparing an acrylon tow fiber by virtue of an electrospinning technique, and carrying out chopping, dispersing and grinding, so as to obtain an acrylon pulp fiber, wherein the grinding is carried out by virtue of a screw type pulping machine; the screw type pulping machine comprises a grinding channel and a screw rod; the screw rod is arranged in the grinding channel, and a screw thread crest on the screw rod is a rough surface. By virtue of the screw type pulping machine, the rough surface of the screw thread crest of the screw rod is matched with the inner wall of the grinding channel when an acrylon short fiber is conveyed so as to grind, so that the working efficiency is improved; secondly, the grinding of the screw type pulping machine is relatively adequate and uniform, so that a branch structure of the acrylon pulp fiber is relatively uniform, and the tensile strength of the material is improved; besides, compared with a disc type pulping machine, the screw type pulping machine has the advantages that the wear is little, the utilization ratio of raw materials is improved, and the cost is saved.