Preparation method of biomass-based inorganic polymer flexibilizer

The invention discloses a preparation method of a biomass-based inorganic polymer flexibilizer. The biomass-based inorganic polymer flexibilizer comprises 60-100% of silicon carbon powder, 1-10% of calcium chloride, 1-10% of a coupling agent, 1-10% of a dispersant and 1-10% of grease. The silicon carbon material is used as a raw material, and the fiber surface is organically modified through high-temperature thermal activation, chemical treatment and other reactions to make the fiber surface keep a unique fibrous structure, the microporous fiber structure shows perfect high elasticity in a material filling phase, the silicon carbon material is organically modified by virtue of an esterification reaction, and a high polymer material is used for filling fiber pore channels with high adsorbability in a breakthrough manner, so that the pore channels have elasticity, the toughness of the fiber is greatly improved, the surface of the silicon-carbon material is changed from complete hydrophilicity to moderate lipoph