Preparation method of density enhancer-added geopolymer-starch foam particle composite insulation material

The invention provides a density enhancer-added geopolymer-starch foam particle composite insulation material and a preparation method thereof, and belongs to the field of building materials. The density enhancer-added geopolymer-starch foam particle composite insulation material comprises the following raw materials in parts by weight: 20-30 parts of sodium hydroxide, 5-30 parts of water, 70-150 parts of water glass, 70-150 parts of kaolin, 5-15 parts of starch foam particles and 10-60 parts of density enhancer. The preparation method comprises the following steps: preparing metakaolin, preparing alkali exciting liquid, mixing the metakaolin and the alkali exciting liquid, adding starch foam particles and performing injection moulding. The preparation method has a unique step that before the geopolymer and the starch foam particles are mixed, the density enhancer and the alkali exciting liquid are fully mixed, so that stratification does not appear during mixing of the geopolymer and the starch foam particle