Cleaning method of spinning element and application thereof

The invention relates to the technical field of fiber spinning, in particular to a cleaning method of a spinning element and application of the cleaning method. The method comprises the following steps: performing at least one pretreatment on a spinning element by adopting a first solvent, and performing fine treatment by adopting supercritical carbon dioxide in the presence of a second solvent. According to the method, the spinning element pretreated by the first solvent is finely treated by adopting supercritical carbon dioxide in the presence of the second solvent, and residual polyacrylonitrile in the pretreated spinning element is better dissolved in the solvent under the plasticizing action of the supercritical carbon dioxide; meanwhile, the supercritical carbon dioxide can enter a narrow space to clean the original part for spinning due to the special property of the supercritical carbon dioxide, the clean spinning element without residual impurities can be obtained, the spinning element cannot be dama