Processing method of fern powder

The invention relates to a processing method of fern powder. The processing method is characterized by comprising the following steps: a, raw material crushing: washing fresh kudzuvine root with water to remove silt and crushing; b, oxidation and degumming; c, refining: carrying out slurry-residue separation, collecting slurry, adding Potentillafulgens Wall.exHook. root or with the whole grass roots and standing, realizing powder-silt separation, and collecting powder-containing slurry; d, drying: letting slurry obtained after removal of silt and impurities stand, collecting sediments and drying so as to obtain a finished product. 140 jin of dried fern powder can be extracted from 1 ton of fern rhizome by the technical scheme. By a traditional technology, only 120 jin of fern powder can be extracted. Flour yield of the technology in the invention is raised by 15% in comparison with flour yield of a traditional technology, and production efficiency of the technology in the invention is about 4 times higher tha