Lignin-based fillers, and one kind of preparation and application

The present invention discloses a lignin-based filler and a preparation method and application, relates to the chemical industry, for producing an object to provide a low cost, over the use effect, can completely replace flour UF resin filler. The main aspect is adopted: the plant biomass residue is subjected to hydrolysis to give a powder plant biomass residue; industrial purification treatment of alkali lignin, alkali lignin powder obtained after industrial purification; the plant biomass industrial base powder and the residue was lignin powder mixed to prepare the lignin-based filler. The present invention is primarily used as an additive urea-formaldehyde resin adhesive.